diff --git a/config.ts b/config.ts
new file mode 100644
index 0000000..42bcb40
--- /dev/null
+++ b/config.ts
@@ -0,0 +1,37 @@
+/**
+ * Here you can change various settings like database credentials, http settings and more.
+ * 
+ * Debug mode and MongoDB credentials are set via enviroment variables for security reasons.
+ */
+export const config: IConfig = {
+    authentification: {
+        pepper: 'J3%_zö\\^',
+        salt_length: 8,
+        argonTimecost: 8,
+        minPasswordLength: 4,
+        maxPasswordLength: 150
+    },
+    http: {
+        port: 2009,
+        host: "0.0.0.0"
+    }
+}
+/**
+ * END OF CONFIG
+ * ====================
+ */
+
+
+export interface IConfig {
+    authentification: {
+        pepper: string,
+        salt_length: number,
+        argonTimecost: number,
+        minPasswordLength: number,
+        maxPasswordLength: number
+    },
+    http: {
+        port: number,
+        host: string
+    }
+}
\ No newline at end of file
diff --git a/package-lock.json b/package-lock.json
index d1d5cf3..7e9644b 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -14,10 +14,19 @@
         "kuler": "^2.0.0"
       }
     },
-    "@sqltools/formatter": {
-      "version": "1.2.2",
-      "resolved": "https://registry.npmjs.org/@sqltools/formatter/-/formatter-1.2.2.tgz",
-      "integrity": "sha512-/5O7Fq6Vnv8L6ucmPjaWbVG1XkP4FO+w5glqfkIsq3Xw4oyNAdJddbnYodNDAfjVUvo/rrSCTom4kAND7T1o5Q=="
+    "@phc/format": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/@phc/format/-/format-1.0.0.tgz",
+      "integrity": "sha512-m7X9U6BG2+J+R1lSOdCiITLLrxm+cWlNI3HUFA92oLO77ObGNzaKdh8pMLqdZcshtkKuV84olNNXDfMc4FezBQ=="
+    },
+    "@types/argon2": {
+      "version": "0.15.0",
+      "resolved": "https://registry.npmjs.org/@types/argon2/-/argon2-0.15.0.tgz",
+      "integrity": "sha1-4UnLQvsKTLGk1i+KIjCbTIJL2Ag=",
+      "dev": true,
+      "requires": {
+        "argon2": "*"
+      }
     },
     "@types/body-parser": {
       "version": "1.19.0",
@@ -111,6 +120,16 @@
         "@types/node": "*"
       }
     },
+    "@types/mongoose": {
+      "version": "5.10.3",
+      "resolved": "https://registry.npmjs.org/@types/mongoose/-/mongoose-5.10.3.tgz",
+      "integrity": "sha512-VfdnaFImXEJZZiuL2ID/ysZs4inOIjxwrAnUgkr5eum2O2BLhFkiSI0i87AwignVva1qWTJ3H3DyM0Rf4USJ4A==",
+      "dev": true,
+      "requires": {
+        "@types/mongodb": "*",
+        "@types/node": "*"
+      }
+    },
     "@types/mysql": {
       "version": "2.15.16",
       "resolved": "https://registry.npmjs.org/@types/mysql/-/mysql-2.15.16.tgz",
@@ -163,6 +182,15 @@
         "winston": "*"
       }
     },
+    "@types/zeromq": {
+      "version": "4.6.3",
+      "resolved": "https://registry.npmjs.org/@types/zeromq/-/zeromq-4.6.3.tgz",
+      "integrity": "sha512-nuCaHBIvIi94LJygkHlLXv7dDK9ocNEKvOoa16n/XxXJhQHf5JX8Hd0Aq4fqhmY+2rAcBfsAFmQfqWWMuB7qUQ==",
+      "dev": true,
+      "requires": {
+        "@types/node": "*"
+      }
+    },
     "JSONStream": {
       "version": "1.3.5",
       "resolved": "https://registry.npmjs.org/JSONStream/-/JSONStream-1.3.5.tgz",
@@ -172,6 +200,11 @@
         "through": ">=2.2.7 <3"
       }
     },
+    "abbrev": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/abbrev/-/abbrev-1.1.1.tgz",
+      "integrity": "sha512-nne9/IiQ/hzIhY6pdDnbBtz7DjPTKrY00P/zvPSm5pOFkl6xuGrGnXn/VtTNNfNtAfZ9/1RtehkszU9qcTii0Q=="
+    },
     "accepts": {
       "version": "1.3.7",
       "resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.7.tgz",
@@ -181,40 +214,58 @@
         "negotiator": "0.6.2"
       }
     },
-    "ansi-regex": {
-      "version": "5.0.0",
-      "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-5.0.0.tgz",
-      "integrity": "sha512-bY6fj56OUQ0hU1KjFNDQuJFezqKdrAyFdIevADiqrWHwSlbmBNMHp5ak2f40Pm8JTFyM2mqxkG6ngkHO11f/lg=="
+    "aproba": {
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/aproba/-/aproba-1.2.0.tgz",
+      "integrity": "sha512-Y9J6ZjXtoYh8RnXVCMOU/ttDmk1aBjunq9vO0ta5x85WDQiQfUF9sIPBITdbiiIVcBo03Hi3jMxigBtsddlXRw=="
     },
-    "ansi-styles": {
-      "version": "4.3.0",
-      "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-4.3.0.tgz",
-      "integrity": "sha512-zbB9rCJAT1rbjiVDb2hqKFHNYLxgtk8NURxZ3IZwD3F6NtxbXZQCnnSi1Lkx+IDohdPlFp222wVALIheZJQSEg==",
+    "are-we-there-yet": {
+      "version": "1.1.5",
+      "resolved": "https://registry.npmjs.org/are-we-there-yet/-/are-we-there-yet-1.1.5.tgz",
+      "integrity": "sha512-5hYdAkZlcG8tOLujVDTgCT+uPX0VnpAH28gWsLfzpXYm7wP6mp5Q/gYyR7YQ0cKVJcXJnl3j2kpBan13PtQf6w==",
       "requires": {
-        "color-convert": "^2.0.1"
+        "delegates": "^1.0.0",
+        "readable-stream": "^2.0.6"
+      },
+      "dependencies": {
+        "readable-stream": {
+          "version": "2.3.7",
+          "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-2.3.7.tgz",
+          "integrity": "sha512-Ebho8K4jIbHAxnuxi7o42OrZgF/ZTNcsZj6nRKyUmkhLFq8CHItp/fy6hQZuZmP/n3yZ9VBUbp4zz/mX8hmYPw==",
+          "requires": {
+            "core-util-is": "~1.0.0",
+            "inherits": "~2.0.3",
+            "isarray": "~1.0.0",
+            "process-nextick-args": "~2.0.0",
+            "safe-buffer": "~5.1.1",
+            "string_decoder": "~1.1.1",
+            "util-deprecate": "~1.0.1"
+          }
+        },
+        "string_decoder": {
+          "version": "1.1.1",
+          "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.1.1.tgz",
+          "integrity": "sha512-n/ShnvDi6FHbbVfviro+WojiFzv+s8MPMHBczVePfUpDJLwoLT0ht1l4YwBCbi8pJAveEEdnkHyPyTP/mzRfwg==",
+          "requires": {
+            "safe-buffer": "~5.1.0"
+          }
+        }
       }
     },
-    "any-promise": {
-      "version": "1.3.0",
-      "resolved": "https://registry.npmjs.org/any-promise/-/any-promise-1.3.0.tgz",
-      "integrity": "sha1-q8av7tzqUugJzcA3au0845Y10X8="
-    },
-    "app-root-path": {
-      "version": "3.0.0",
-      "resolved": "https://registry.npmjs.org/app-root-path/-/app-root-path-3.0.0.tgz",
-      "integrity": "sha512-qMcx+Gy2UZynHjOHOIXPNvpf+9cjvk3cWrBBK7zg4gH9+clobJRb9NGzcT7mQTcV/6Gm/1WelUtqxVXnNlrwcw=="
-    },
     "arg": {
       "version": "4.1.3",
       "resolved": "https://registry.npmjs.org/arg/-/arg-4.1.3.tgz",
       "integrity": "sha512-58S9QDqG0Xx27YwPSt9fJxivjYl432YCwfDMfZ+71RAqUrZef7LrKQZ3LHLOwCS4FLNBplP533Zx895SeOCHvA=="
     },
-    "argparse": {
-      "version": "1.0.10",
-      "resolved": "https://registry.npmjs.org/argparse/-/argparse-1.0.10.tgz",
-      "integrity": "sha512-o5Roy6tNG4SL/FOkCAN6RzjiakZS25RLYFrcMttJqbdd8BWrnA+fGz57iN5Pb06pvBGvl5gQ0B48dJlslXvoTg==",
+    "argon2": {
+      "version": "0.27.1",
+      "resolved": "https://registry.npmjs.org/argon2/-/argon2-0.27.1.tgz",
+      "integrity": "sha512-On68kSinTh4DOlLVCEYgQYpx0yuGRsqU9UwV7jUB26PWv+092r8Uz891KFVEqdsksiDXDhA7kXL4z3in/FBItg==",
       "requires": {
-        "sprintf-js": "~1.0.2"
+        "@phc/format": "^1.0.0",
+        "node-addon-api": "^3.0.2",
+        "node-pre-gyp": "^0.17.0",
+        "opencollective-postinstall": "^2.0.3"
       }
     },
     "array-flatten": {
@@ -232,11 +283,6 @@
       "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-1.0.0.tgz",
       "integrity": "sha1-ibTRmasr7kneFk6gK4nORi1xt2c="
     },
-    "base64-js": {
-      "version": "1.5.1",
-      "resolved": "https://registry.npmjs.org/base64-js/-/base64-js-1.5.1.tgz",
-      "integrity": "sha512-AKpaYlHn8t4SVbOHCy+b5+KKgvR4vrsD8vbvrbiQJps7fKDTkjkDry6ji0rUJjC0kzbNePLwzxq8iypo41qeWA=="
-    },
     "bignumber.js": {
       "version": "9.0.0",
       "resolved": "https://registry.npmjs.org/bignumber.js/-/bignumber.js-9.0.0.tgz",
@@ -311,15 +357,6 @@
       "resolved": "https://registry.npmjs.org/bson/-/bson-1.1.5.tgz",
       "integrity": "sha512-kDuEzldR21lHciPQAIulLs1LZlCXdLziXI6Mb/TDkwXhb//UORJNPXgcRs2CuO4H0DcMkpfT3/ySsP3unoZjBg=="
     },
-    "buffer": {
-      "version": "5.7.1",
-      "resolved": "https://registry.npmjs.org/buffer/-/buffer-5.7.1.tgz",
-      "integrity": "sha512-EHcyIPBQ4BSGlvjB16k5KgAJ27CIsHY/2JBmCRReo48y9rQ3MaUzWX3KVlBa4U7MyX02HdVj0K7C3WaB3ju7FQ==",
-      "requires": {
-        "base64-js": "^1.3.1",
-        "ieee754": "^1.1.13"
-      }
-    },
     "buffer-equal-constant-time": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/buffer-equal-constant-time/-/buffer-equal-constant-time-1.0.1.tgz",
@@ -335,62 +372,15 @@
       "resolved": "https://registry.npmjs.org/bytes/-/bytes-3.1.0.tgz",
       "integrity": "sha512-zauLjrfCG+xvoyaqLoV8bLVXXNGC4JqlxFCutSDWA6fJrTo2ZuvLYTqZ7aHBLZSMOopbzwv8f+wZcVzfVTI2Dg=="
     },
-    "camelcase": {
-      "version": "5.3.1",
-      "resolved": "https://registry.npmjs.org/camelcase/-/camelcase-5.3.1.tgz",
-      "integrity": "sha512-L28STB170nwWS63UjtlEOE3dldQApaJXZkOI1uMFfzf3rRuPegHaHesyee+YxQ+W6SvRDQV6UrdOdRiR153wJg=="
+    "chownr": {
+      "version": "1.1.4",
+      "resolved": "https://registry.npmjs.org/chownr/-/chownr-1.1.4.tgz",
+      "integrity": "sha512-jJ0bqzaylmJtVnNgzTeSOs8DPavpbYgEr/b0YL8/2GO3xJEhInFmhKMUnEJQjZumK7KXGFhUy89PrsJWlakBVg=="
     },
-    "chalk": {
-      "version": "4.1.0",
-      "resolved": "https://registry.npmjs.org/chalk/-/chalk-4.1.0.tgz",
-      "integrity": "sha512-qwx12AxXe2Q5xQ43Ac//I6v5aXTipYrSESdOgzrN+9XjgEpyjpKuvSGaN4qE93f7TQTlerQQ8S+EQ0EyDoVL1A==",
-      "requires": {
-        "ansi-styles": "^4.1.0",
-        "supports-color": "^7.1.0"
-      }
-    },
-    "cli-highlight": {
-      "version": "2.1.9",
-      "resolved": "https://registry.npmjs.org/cli-highlight/-/cli-highlight-2.1.9.tgz",
-      "integrity": "sha512-t8RNIZgiI24i/mslZ8XT8o660RUj5ZbUJpEZrZa/BNekTzdC2LfMRAnt0Y7sgzNM4FGW5tmWg/YnbTH8o1eIOQ==",
-      "requires": {
-        "chalk": "^4.0.0",
-        "highlight.js": "^10.0.0",
-        "mz": "^2.4.0",
-        "parse5": "^5.1.1",
-        "parse5-htmlparser2-tree-adapter": "^6.0.0",
-        "yargs": "^15.0.0"
-      },
-      "dependencies": {
-        "yargs": {
-          "version": "15.4.1",
-          "resolved": "https://registry.npmjs.org/yargs/-/yargs-15.4.1.tgz",
-          "integrity": "sha512-aePbxDmcYW++PaqBsJ+HYUFwCdv4LVvdnhBy78E57PIor8/OVvhMrADFFEDh8DHDFRv/O9i3lPhsENjO7QX0+A==",
-          "requires": {
-            "cliui": "^6.0.0",
-            "decamelize": "^1.2.0",
-            "find-up": "^4.1.0",
-            "get-caller-file": "^2.0.1",
-            "require-directory": "^2.1.1",
-            "require-main-filename": "^2.0.0",
-            "set-blocking": "^2.0.0",
-            "string-width": "^4.2.0",
-            "which-module": "^2.0.0",
-            "y18n": "^4.0.0",
-            "yargs-parser": "^18.1.2"
-          }
-        }
-      }
-    },
-    "cliui": {
-      "version": "6.0.0",
-      "resolved": "https://registry.npmjs.org/cliui/-/cliui-6.0.0.tgz",
-      "integrity": "sha512-t6wbgtoCXvAzst7QgXxJYqPt0usEfbgQdftEPbLL/cvv6HPE5VgvqCuAIDR0NgU52ds6rFwqrgakNLrHEjCbrQ==",
-      "requires": {
-        "string-width": "^4.2.0",
-        "strip-ansi": "^6.0.0",
-        "wrap-ansi": "^6.2.0"
-      }
+    "code-point-at": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/code-point-at/-/code-point-at-1.1.0.tgz",
+      "integrity": "sha1-DQcLTQQ6W+ozovGkDi7bPZpMz3c="
     },
     "color": {
       "version": "3.0.0",
@@ -416,14 +406,6 @@
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       }
     },
-    "color-convert": {
-      "version": "2.0.1",
-      "resolved": "https://registry.npmjs.org/color-convert/-/color-convert-2.0.1.tgz",
-      "integrity": "sha512-RRECPsj7iu/xb5oKYcsFHSppFNnsj/52OVTRKb4zP5onXwVF3zVmmToNcOfGC+CRDpfK/U584fMg38ZHCaElKQ==",
-      "requires": {
-        "color-name": "~1.1.4"
-      }
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     "color-name": {
       "version": "1.1.4",
       "resolved": "https://registry.npmjs.org/color-name/-/color-name-1.1.4.tgz",
@@ -462,6 +444,11 @@
       "resolved": "https://registry.npmjs.org/concat-map/-/concat-map-0.0.1.tgz",
       "integrity": "sha1-2Klr13/Wjfd5OnMDajug1UBdR3s="
     },
+    "console-control-strings": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/console-control-strings/-/console-control-strings-1.1.0.tgz",
+      "integrity": "sha1-PXz0Rk22RG6mRL9LOVB/mFEAjo4="
+    },
     "content-disposition": {
       "version": "0.5.3",
       "resolved": "https://registry.npmjs.org/content-disposition/-/content-disposition-0.5.3.tgz",
@@ -512,10 +499,15 @@
         "ms": "2.0.0"
       }
     },
-    "decamelize": {
-      "version": "1.2.0",
-      "resolved": "https://registry.npmjs.org/decamelize/-/decamelize-1.2.0.tgz",
-      "integrity": "sha1-9lNNFRSCabIDUue+4m9QH5oZEpA="
+    "deep-extend": {
+      "version": "0.6.0",
+      "resolved": "https://registry.npmjs.org/deep-extend/-/deep-extend-0.6.0.tgz",
+      "integrity": "sha512-LOHxIOaPYdHlJRtCQfDIVZtfw/ufM8+rVj649RIHzcm/vGwQRXFt6OPqIFWsm2XEMrNIEtWR64sY1LEKD2vAOA=="
+    },
+    "delegates": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/delegates/-/delegates-1.0.0.tgz",
+      "integrity": "sha1-hMbhWbgZBP3KWaDvRM2HDTElD5o="
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     "denque": {
       "version": "1.4.1",
@@ -532,6 +524,11 @@
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       "integrity": "sha1-l4hXRCxEdJ5CBmE+N5RiBYJqvYA="
     },
+    "detect-libc": {
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/detect-libc/-/detect-libc-1.0.3.tgz",
+      "integrity": "sha1-+hN8S9aY7fVc1c0CrFWfkaTEups="
+    },
     "diff": {
       "version": "4.0.2",
       "resolved": "https://registry.npmjs.org/diff/-/diff-4.0.2.tgz",
@@ -555,11 +552,6 @@
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       "integrity": "sha1-WQxhFWsK4vTwJVcyoViyZrxWsh0="
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-    "emoji-regex": {
-      "version": "8.0.0",
-      "resolved": "https://registry.npmjs.org/emoji-regex/-/emoji-regex-8.0.0.tgz",
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       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/enabled/-/enabled-2.0.0.tgz",
@@ -583,26 +575,11 @@
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-    "escalade": {
-      "version": "3.1.1",
-      "resolved": "https://registry.npmjs.org/escalade/-/escalade-3.1.1.tgz",
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     "escape-html": {
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-    "escape-string-regexp": {
-      "version": "1.0.5",
-      "resolved": "https://registry.npmjs.org/escape-string-regexp/-/escape-string-regexp-1.0.5.tgz",
-      "integrity": "sha1-G2HAViGQqN/2rjuyzwIAyhMLhtQ="
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-    "esprima": {
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@@ -679,15 +651,6 @@
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@@ -703,15 +666,66 @@
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-      },
-      "dependencies": {
-        "cliui": {
-          "version": "7.0.4",
-          "resolved": "https://registry.npmjs.org/cliui/-/cliui-7.0.4.tgz",
-          "integrity": "sha512-OcRE68cOsVMXp1Yvonl/fzkQOyjLSu/8bhPDfQt0e0/Eb283TKP20Fs2MqoPsr9SwA595rRCA+QMzYc9nBP+JQ==",
-          "requires": {
-            "string-width": "^4.2.0",
-            "strip-ansi": "^6.0.0",
-            "wrap-ansi": "^7.0.0"
-          }
-        },
-        "wrap-ansi": {
-          "version": "7.0.0",
-          "resolved": "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-7.0.0.tgz",
-          "integrity": "sha512-YVGIj2kamLSTxw6NsZjoBxfSwsn0ycdesmc4p+Q21c5zPuZ1pl+NfxVdxPtdHvmNVOQ6XSYG4AUtyt/Fi7D16Q==",
-          "requires": {
-            "ansi-styles": "^4.0.0",
-            "string-width": "^4.1.0",
-            "strip-ansi": "^6.0.0"
-          }
-        },
-        "y18n": {
-          "version": "5.0.5",
-          "resolved": "https://registry.npmjs.org/y18n/-/y18n-5.0.5.tgz",
-          "integrity": "sha512-hsRUr4FFrvhhRH12wOdfs38Gy7k2FFzB9qgN9v3aLykRq0dRcdcpz5C9FxdS2NuhOrI/628b/KSTJ3rwHysYSg=="
-        },
-        "yargs-parser": {
-          "version": "20.2.4",
-          "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-20.2.4.tgz",
-          "integrity": "sha512-WOkpgNhPTlE73h4VFAFsOnomJVaovO8VqLDzy5saChRBFQFBoMYirowyW+Q9HB4HFF4Z7VZTiG3iSzJJA29yRA=="
-        }
-      }
-    },
-    "yargs-parser": {
-      "version": "18.1.3",
-      "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-18.1.3.tgz",
-      "integrity": "sha512-o50j0JeToy/4K6OZcaQmW6lyXXKhq7csREXcDwk2omFPJEwUNOVtJKvmDr9EI1fAJZUyZcRF7kxGBWmRXudrCQ==",
-      "requires": {
-        "camelcase": "^5.0.0",
-        "decamelize": "^1.2.0"
-      }
+    "yallist": {
+      "version": "3.1.1",
+      "resolved": "https://registry.npmjs.org/yallist/-/yallist-3.1.1.tgz",
+      "integrity": "sha512-a4UGQaWPH59mOXUYnAG2ewncQS4i4F43Tv3JoAM+s2VDAmS9NsK8GpDMLrCHPksFT7h3K6TOoUNn2pb7RoXx4g=="
     },
     "yn": {
       "version": "3.1.1",
       "resolved": "https://registry.npmjs.org/yn/-/yn-3.1.1.tgz",
       "integrity": "sha512-Ux4ygGWsu2c7isFWe8Yu1YluJmqVhxqK2cLXNQA5AcC3QfbGNpM7fu0Y8b/z16pXLnFxZYvWhd3fhBY9DLmC6Q=="
+    },
+    "zeromq": {
+      "version": "6.0.0-beta.6",
+      "resolved": "https://registry.npmjs.org/zeromq/-/zeromq-6.0.0-beta.6.tgz",
+      "integrity": "sha512-wLf6M7pBHijl+BRltUL2VoDpgbQcOZetiX8UzycHL8CcYFxYnRrpoG5fi3UX3+Umavz1lk4/dGaQez8qiDgr/Q==",
+      "requires": {
+        "node-gyp-build": "^4.1.0"
+      }
     }
   }
 }
diff --git a/package.json b/package.json
index a6c68fe..bcae04a 100644
--- a/package.json
+++ b/package.json
@@ -21,6 +21,7 @@
   "author": "Mondei1",
   "license": "MIT",
   "dependencies": {
+    "argon2": "^0.27.1",
     "body-parser": "^1.19.0",
     "cors": "^2.8.5",
     "dotenv": "^8.2.0",
@@ -30,9 +31,9 @@
     "mongoose": "^5.11.8",
     "mysql": "^2.18.1",
     "ts-node": "^9.1.1",
-    "typeorm": "^0.2.29",
     "typescript": "^4.1.3",
-    "winston": "^3.3.3"
+    "winston": "^3.3.3",
+    "zeromq": "^6.0.0-beta.6"
   },
   "devDependencies": {
     "@types/typescript": "2.0.0",
@@ -42,6 +43,9 @@
     "@types/winston": "2.4.4",
     "@types/dotenv": "8.2.0",
     "@types/jsonwebtoken": "8.5.0",
-    "@types/mysql": "2.15.16"
+    "@types/mysql": "2.15.16",
+    "@types/mongoose": "5.10.3",
+    "@types/argon2": "0.15.0",
+    "@types/zeromq": "4.6.3"
   }
 }
diff --git a/src/app.ts b/src/app.ts
index fc039c1..86186de 100644
--- a/src/app.ts
+++ b/src/app.ts
@@ -1,8 +1,27 @@
+import * as bodyParser from 'body-parser';
+import * as cors from 'cors';
+import { config as dconfig } from 'dotenv';
+import * as express from 'express';
 import * as rpc from 'jayson';
-import { createConnection } from 'typeorm';
+import * as mongoose from 'mongoose';
 import * as winston from 'winston';
 
+import { config } from '../config';
+import { hashPassword, randomPepper, randomString } from './helper/crypto';
+import { InvoiceScheduler } from './helper/invoiceScheduler';
+import { User } from './models/user/user.model';
+import { invoiceRouter } from './routes/invoice';
+
+// Load .env
+dconfig({ debug: true, encoding: 'UTF-8' });
+
 export const IS_DEBUG = process.env.DEBUG == 'true';
+export const MONGO_URI = process.env.MONGO_URI || "";
+export const JWT_SECRET = process.env.JWT_SECRET || "";
+export const INVOICE_SECRET = process.env.INVOICE_SECRET || "";
+
+export let rpcClient: rpc.HttpClient | undefined = undefined;
+export let invoiceScheduler: InvoiceScheduler | undefined = undefined;
 
 export let logger: winston.Logger;
 
@@ -38,30 +57,68 @@ async function run() {
         )
     }));
 
-    const dbConnection = await createConnection({
-        type: 'mysql',
-        host: 'localhost',
-        port: 3306,
-        username: 'librepay',
-        password: 'librepay',
-        database: 'librepay',
-        entities: ['models/**/*.ts'],
-        synchronize: true,
-        logging: false
-    }).catch(error => {
-        logger.error(`Connection to database failed: ${error}`);
+    if (IS_DEBUG) {
+        logger.info('Debug mode is enabled. Do not use this in production!');
+    }
+
+    if (JWT_SECRET == '') {
+        logger.crit('No JWT secret was provided. Make sure you add JWT_SECRET=YOUR_SECRET to your .env file.');
+        process.exit(1);
+    }
+
+    if (MONGO_URI == '') {
+        logger.crit('No MongoDB URI was provided. Make sure you add MONGO_URI=mongodb+srv://... to your .env file.')
+        process.exit(1);
+    }
+
+    if (INVOICE_SECRET == '') {
+        logger.crit('No invoice secret was provided. Make sure you add INVOICE_SECRET=(long random string) to your .env file.')
+        process.exit(1);
+    }
+
+    const connection = await mongoose.connect(MONGO_URI, { useNewUrlParser: true, useUnifiedTopology: true }).catch((err) => {
+        logger.crit("Database connection could not be made: ", err);
         process.exit(1);
     });
+    logger.info(`Database connection made to ${mongoose.connection.host}`);
+
+    // Check if admin account doesn't exists
+    if((await User.countDocuments()) == 0) {
+        const randomPassword = "$1" + randomString(12);
+        const salt = randomString(config.authentification.salt_length);
+
+        await User.create({
+            name: 'admin',
+            password: await hashPassword(randomPassword + salt + randomPepper()),
+            salt,
+            createdAt: new Date(Date.now()),
+            lastLogin: new Date(0)
+        });
+        logger.info("=================================================================================");
+        logger.info("ADMIN USER HAS BEEN CREATED! Username: admin\tPassword: " + randomPassword);
+        logger.info("=================================================================================");
+    } else {
+        logger.debug("At least one admin user already exists, skip.");
+    }
+
+    invoiceScheduler = new InvoiceScheduler();
     
-    const client = rpc.Client.http({
+    const app = express();
+    app.use(express.json());
+    app.use(cors());
+    app.use(bodyParser.json({ limit: '2kb' }));
+
+    app.get('/', (req, res) => res.status(200).send('OK'));
+    app.use('/invoice', invoiceRouter);
+
+    app.listen(config.http.port, config.http.host, () => {
+        logger.info(`HTTP server started on port ${config.http.host}:${config.http.port}`);
+    });
+
+    rpcClient = rpc.Client.http({
         port: 18332,
         auth: 'admin:admin'        
     });
-
-    /*client.request('getnewaddress', ['TestRPC', 'bech32'], (err, response) => {
-        if (err) throw err;
-        console.log(response.result);
-    })*/
 }
 
 run();
\ No newline at end of file
diff --git a/src/controllers/invoice.ts b/src/controllers/invoice.ts
index d401e68..c57ec7c 100644
--- a/src/controllers/invoice.ts
+++ b/src/controllers/invoice.ts
@@ -1,5 +1,79 @@
 import { Request, Response } from "express";
+import { invoiceScheduler, INVOICE_SECRET } from "../app";
+import { CryptoUnits, FiatUnits } from "../helper/types";
+import { ICart, IInvoice } from "../models/invoice/invoice.interface";
+import { Invoice } from "../models/invoice/invoice.model";
+import { rpcClient } from '../app';
 
+// POST /invoice/?sercet=XYZ
 export async function createInvoice(req: Request, res: Response) {
-    const paymentMethods = req.body.methods;
+    const secret = req.query.secret;
+    if (secret === undefined) {
+        res.status(401).send({ message: 'secret parameter is missing' });
+        return;
+    } else {
+        if (secret !== INVOICE_SECRET) {
+            setTimeout(() => {
+                res.status(401).send();
+            }, 1200);
+            return;
+        }
+    }
+
+    const paymentMethods: CryptoUnits[] = req.body.methods;
+    const successUrl: string = req.body.successUrl;
+    const cancelUrl: string = req.body.cancelUrl;
+    const cart: ICart[] = req.body.cart;
+    const currency: FiatUnits = req.body.currency;
+    const totalPrice: number = req.body.totalPrice;
+
+    if (paymentMethods === undefined) {
+        res.status(400).send({ message: '"paymentMethods" are not provided!' });
+        return;
+    }
+
+    if (successUrl === undefined) {
+        res.status(400).send({ message: '"successUrl" is not provided!' });
+        return;
+    }
+
+    if (cancelUrl === undefined) {
+        res.status(400).send({ message: '"cancelUrl" is not provided!' });
+        return;
+    }
+
+    if (currency === undefined) {
+        res.status(400).send({ message: '"currency" is not provided!' });
+        return;
+    }
+
+    /*if (cart === undefined && totalPrice === undefined) {
+        res.status(400).send({ message: 'Either "cart" or "totalPrice" has to be defined.' });
+        return;
+    }*/
+
+    rpcClient.request('getnewaddress', ['', 'bech32'], async (err, response) => {
+        if (err) throw err;
+        //console.log(response.result);
+
+        Invoice.create({
+            paymentMethods,
+            successUrl,
+            cancelUrl,
+            cart,
+            currency,
+            totalPrice,
+            dueBy: 60,
+            receiveAddress: response.result
+        }, (error, invoice: IInvoice) => {
+            if (error) {
+                res.status(500).send({error: error.message});
+                return;
+            }
+
+            invoiceScheduler.addInvoice(invoice);
+            res.status(200).send({ id: invoice.id });
+        });
+    });
+
 }
\ No newline at end of file
diff --git a/src/helper/crypto.ts b/src/helper/crypto.ts
new file mode 100644
index 0000000..5773f8f
--- /dev/null
+++ b/src/helper/crypto.ts
@@ -0,0 +1,105 @@
+import { hash, verify } from 'argon2';
+import { config } from '../../config';
+import { IS_DEBUG, logger } from '../app';
+
+export async function hashPassword(input: string): Promise<string> {
+    const start = Date.now();
+
+    return new Promise<string>(async (resolve, reject) => {
+        // Get real password (remove salt and pepper)
+        const realPassword = input.substring(0, input.length - config.authentification.salt_length - 1);
+        if (!check_password_requirements(realPassword)) {
+            if (!IS_DEBUG) reject("This password does not meet the minimum requirements!");
+            else {
+                reject(`This password does not meet the minimum requirements! (${input} => ${realPassword})`);
+            }
+            return;
+        }
+
+        try {
+            const hashed = await hash(input, {
+                hashLength: 42,
+                memoryCost: 1024*32,
+                parallelism: 2,
+                timeCost: config.authentification.argonTimecost
+            });
+            const finished = Date.now();
+            logger.debug("Hashing took " + (finished-start) + "ms to finish! " + input);
+            resolve(hashed);
+        } catch(err) {
+            reject(err);
+        }
+    });
+}
+
+/**
+ * Verfiy If given password matches with provided hash by brute forcing the pepper.
+ * @param password Password with salt appended
+ * @param hashInput Hash from database
+ */
+export async function verifyPassword(password: string, hashInput: string): Promise<boolean> {
+    return new Promise<boolean>(async (resolve, reject) => {
+        const start = Date.now();
+        const peppers = config.authentification.pepper.split('');
+        const realPassword = password.substring(0, password.length - config.authentification.salt_length);
+
+        while (peppers.length !== 0) {
+            const pepper = peppers[Math.floor(Math.random() * peppers.length)];
+            if (IS_DEBUG) {
+                logger.debug(`Try ${password}}${pepper} (left: ${peppers})`);
+            } else {
+                // Show censored password (with fixed length) in non-debug mode to prevent password leaking.
+                logger.debug(`Try ********${password.replace(realPassword, '')}${pepper} (left: ${peppers})`);
+            }
+            if (await verify(hashInput, password + pepper)) {
+                const finished = Date.now();
+                logger.debug("Verifying took " + (finished - start) + "ms to complete!");
+                resolve(true);
+                return;
+            } else {
+                peppers.splice(peppers.indexOf(pepper), 1);
+            }
+        }
+        resolve(false);
+    });
+}
+
+export function randomString(length: number): string {
+    let result           = '';
+    const characters       = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz';
+    const charactersLength = characters.length;
+    for ( let i = 0; i < length; i++ ) {
+        result += characters.charAt(Math.floor(Math.random() * charactersLength));
+    }
+    return result;
+}
+
+export function randomPepper(): string {
+    return config.authentification.pepper.charAt(Math.floor(Math.random() * config.authentification.pepper.length));
+}
+
+/**
+ * Requirements are:
+ *  - at least 8 characters
+ *  - min one upper-, lowercase- and special character
+ *  - min one number
+ */
+export function check_password_requirements(password: string): boolean {
+    // Check for length
+    if (password.length < config.authentification.minPasswordLength ||
+        password.length > config.authentification.maxPasswordLength) return false;
+
+    // Check for one lowercase
+    if (!(/^(?=.*[a-z]).+$/.test(password))) return false;
+
+    // Check for one uppercase
+    if (!(/^(?=.*[A-Z]).+$/.test(password))) return false;
+
+    // Check for one uppercase
+    if (!(/^(?=.*[0-9]).+$/.test(password))) return false;
+
+    // Check for special characters
+    if (!(/[^A-Za-z0-9]/.test(password))) return false;
+
+    return true;
+}
\ No newline at end of file
diff --git a/src/helper/invoiceScheduler.ts b/src/helper/invoiceScheduler.ts
new file mode 100644
index 0000000..9fa737c
--- /dev/null
+++ b/src/helper/invoiceScheduler.ts
@@ -0,0 +1,105 @@
+import { IInvoice } from "../models/invoice/invoice.interface";
+import { Subscriber } from 'zeromq';
+import { logger, rpcClient } from "../app";
+import { invoiceRouter } from "../routes/invoice";
+import { Invoice } from "../models/invoice/invoice.model";
+import { PaymentStatus } from "./types";
+
+export class InvoiceScheduler {
+    private pendingInvoices: IInvoice[];
+    private unconfirmedTranscations: IInvoice[];
+    private sock: Subscriber;
+
+    constructor() {
+        this.unconfirmedTranscations = [];
+        this.pendingInvoices = [];
+
+        // Get all pending transcations
+        Invoice.find({ status: PaymentStatus.PENDING }).then(invoices => {
+            this.pendingInvoices = invoices;
+        });
+
+        // Get all unconfirmed transactions
+        Invoice.find({ status: PaymentStatus.UNCONFIRMED }).then(invoices => {
+            this.unconfirmedTranscations = invoices;
+        });
+
+        this.sock = new Subscriber();
+        this.sock.connect('tcp://127.0.0.1:29000');
+        this.listen();
+        this.watchConfirmations();
+    }
+
+    addInvoice(invoice: IInvoice) {
+        logger.info(`A new invoice has been created: ${invoice.id}`)
+        this.pendingInvoices.push(invoice);
+    }
+
+    /**
+     * This function waits for Bitcoin Core to respond with raw TX.
+     */
+    private async listen() {        
+        this.sock.subscribe('rawtx');
+
+        logger.info('Now listing for incoming transaction to any invoices ...');
+        for await (const [topic, msg] of this.sock) {
+            const rawtx = msg.toString('hex');
+            logger.debug(`New tx: ${rawtx}`);
+            rpcClient.request('decoderawtransaction', [rawtx], (err, decoded) => {
+                if (err) {
+                    logger.error(`Error while decoding raw tx: ${err.message}`);
+                    return;
+                }
+
+                decoded.result.vout.forEach(output => {
+                    //console.log('Output:', output.scriptPubKey);
+                    
+                    // Loop over each output and check if the address of one matches the one of an invoice.
+                    this.pendingInvoices.forEach(invoice => {
+                        // We found our transaction
+                        if (output.scriptPubKey.addresses === undefined) return;    // Sometimes (weird) transaction don't have any addresses
+                        if (output.scriptPubKey.addresses.indexOf(invoice.receiveAddress) !== -1) {
+                            logger.info(`Transcation for invoice ${invoice.id} received! (${decoded.result.hash})`);
+
+                            // Change state in database
+                            invoice.status = PaymentStatus.UNCONFIRMED;
+                            invoice.transcationHash = decoded.result.txid;
+                            invoice.save();
+
+                            // Push to array & remove from pending
+                            this.unconfirmedTranscations.push(invoice);
+                            this.pendingInvoices.splice(this.pendingInvoices.indexOf(invoice), 1);
+                        }
+                    })
+                });                
+            });
+            
+        }
+    }
+
+    /**
+     * This functions loops over each unconfirmed transaction to check if it reached "trusted" threshold.
+     */
+    private watchConfirmations() {
+        setInterval(() => {
+            this.unconfirmedTranscations.forEach(invoice => {
+                rpcClient.request('gettransaction', [invoice.transcationHash], (err, message) => {
+                    if (err) {
+                        logger.error(`Error while fetching confirmation state of ${invoice.transcationHash}: ${err.message}`);
+                        return;
+                    }
+
+                    if (Number(message.result.confirmations) > 2) {
+                        logger.info(`Transaction (${invoice.transcationHash}) has reached more then 2 confirmations and can now be trusted!`);
+                        invoice.status = PaymentStatus.DONE;
+                        invoice.save(); // This will trigger a post save hook that will notify the user.
+
+                        this.unconfirmedTranscations.splice(this.unconfirmedTranscations.indexOf(invoice), 1);
+                    } else {
+                        logger.debug(`Transcation (${invoice.transcationHash}) has not reached his threshold yet.`);
+                    }
+                });
+            });
+        }, 2_000);
+    }
+}
\ No newline at end of file
diff --git a/src/helper/types.ts b/src/helper/types.ts
index 6574abc..5508b5f 100644
--- a/src/helper/types.ts
+++ b/src/helper/types.ts
@@ -1,5 +1,6 @@
 export enum CryptoUnits {
     BITCOIN = 'BTC',
+    BITCOINCASH = 'BCH',
     ETHEREUM = 'ETH',
     LITECOIN = 'LTC',
     DOGECOIN = 'DOGE',
@@ -26,11 +27,4 @@ export enum PaymentStatus {
      * The payment is completed and the crypto is now available.
      */
     DONE = 2
-}
-
-export interface SellItem {
-    price: {
-        unit: number,
-        currency: 
-    }
 }
\ No newline at end of file
diff --git a/src/models/invoice/invoice.interface.ts b/src/models/invoice/invoice.interface.ts
new file mode 100644
index 0000000..23fcdd6
--- /dev/null
+++ b/src/models/invoice/invoice.interface.ts
@@ -0,0 +1,42 @@
+import { Document } from 'mongoose';
+import { CryptoUnits, FiatUnits, PaymentStatus } from '../../helper/types';
+
+export interface ICart {
+    price: number;
+    name: string;
+    image: string;
+    quantity: number;
+}
+
+export interface IInvoice extends Document {
+    // Available payment methods
+    // [btc, xmr, eth, doge]
+    paymentMethods: CryptoUnits[];
+
+    // 1Kss3e9iPB9vTgWJJZ1SZNkkFKcFJXPz9t
+    receiveAddress: string;
+
+    paidWith?: CryptoUnits;
+
+    // Is set when invoice got paid
+    // 3b38c3a215d4e7981e1516b2dcbf76fca58911274d5d55b3d615274d6e10f2c1
+    transcationHash?: string;
+
+    cart?: ICart[];
+    totalPrice?: number;
+    currency: FiatUnits;
+    
+    // Time in minutes the user has to pay.
+    // Time left = (createdAt + dueBy) - Date.now() / 1000
+    dueBy: number;
+
+    status?: PaymentStatus;
+
+    // E-Mail address of user, if he want's a confirmation email.
+    email?: string;
+
+    successUrl: string;
+    cancelUrl: string;
+
+    createdAt?: number;
+}
\ No newline at end of file
diff --git a/src/models/invoice/invoice.model.ts b/src/models/invoice/invoice.model.ts
new file mode 100644
index 0000000..098b78f
--- /dev/null
+++ b/src/models/invoice/invoice.model.ts
@@ -0,0 +1,6 @@
+import { Model, model } from 'mongoose';
+import { IInvoice } from './invoice.interface';
+import { schemaInvoice } from './invoice.schema';
+
+const modelInvoice: Model<IInvoice> = model<IInvoice>('Invoice', schemaInvoice , 'Invoice');
+export { modelInvoice as Invoice };
\ No newline at end of file
diff --git a/src/models/invoice/invoice.schema.ts b/src/models/invoice/invoice.schema.ts
new file mode 100644
index 0000000..c2b1f22
--- /dev/null
+++ b/src/models/invoice/invoice.schema.ts
@@ -0,0 +1,58 @@
+import { NativeError, Schema, SchemaTypes } from 'mongoose';
+import { CryptoUnits, FiatUnits, PaymentStatus } from '../../helper/types';
+import { IInvoice } from './invoice.interface';
+
+const urlRegex = /((([A-Za-z]{3,9}:(?:\/\/)?)(?:[\-;:&=\+\$,\w]+@)?[A-Za-z0-9\.\-]+|(?:www\.|[\-;:&=\+\$,\w]+@)[A-Za-z0-9\.\-]+)((?:\/[\+~%\/\.\w\-_]*)?\??(?:[\-\+=&;%@\.\w_]*)#?(?:[\.\!\/\\\w]*))?)/
+
+const schemaCart = new Schema({
+    price: { type: Number, required: true },
+    name: { type: String, trim: true, required: true },
+    image: { type: String, match: urlRegex, required: true },
+    quantity: { type: Number, default: 1 }
+})
+
+const schemaInvoice = new Schema({
+    paymentMethods: [{ type: String, enum: Object.values(CryptoUnits), default: [CryptoUnits.BITCOIN], required: true }],
+    receiveAddress: { type: String, required: true },
+    paidWith: { type: String, enum: CryptoUnits },
+    transcationHash: { type: String, required: false },
+    cart: [{ type: schemaCart, required: false }],
+    totalPrice: { type: Number, required: false },
+    currency: { type: String, enum: Object.values(FiatUnits), required: false },
+    dueBy: { type: Number, required: true },
+    status: { type: Number, enum: Object.values(PaymentStatus), default: PaymentStatus.PENDING },
+    email: { type: String, required: false },
+    successUrl: { type: String, match: urlRegex, required: false },
+    cancelUrl: { type: String, match: urlRegex, required: false }
+}, {
+    timestamps: {
+        createdAt: true,
+    },
+    versionKey: false
+});
+
+// Validate values
+schemaInvoice.post('validate', function (res, next) {
+    let self = this as IInvoice;
+    
+    // If cart is undefined and price too, error.
+    if ((self.cart === undefined || self.cart.length === 0) && self.totalPrice === undefined) {
+        next(new Error('Either cart or price has to be defined!'));
+        return;
+    }
+
+    // If cart is provided, calculate price.
+    if (self.cart !== undefined && self.totalPrice === undefined) {
+        let totalPrice = 0;
+        
+        for (let i = 0; i < self.cart.length; i++) {
+            const item = self.cart[i];
+            totalPrice += item.price * item.quantity;
+        }
+
+        self.set({ totalPrice });
+    }
+    next();
+})
+
+export { schemaInvoice }
\ No newline at end of file
diff --git a/src/models/user/user.interface.ts b/src/models/user/user.interface.ts
new file mode 100644
index 0000000..4fe0e7a
--- /dev/null
+++ b/src/models/user/user.interface.ts
@@ -0,0 +1,10 @@
+import { Document } from 'mongoose';
+
+export interface IUser extends Document {
+    name: string,
+    password: string,
+    salt: string,
+    lastLogin: Date,
+    twoFASecret?: string,
+    createdAt?: Date
+}
\ No newline at end of file
diff --git a/src/models/user/user.model.ts b/src/models/user/user.model.ts
new file mode 100644
index 0000000..7beeae0
--- /dev/null
+++ b/src/models/user/user.model.ts
@@ -0,0 +1,6 @@
+import { Model, model } from 'mongoose';
+import { IUser } from "./user.interface";
+import { schemaUser } from './user.schema';
+
+const modelUser: Model<IUser> = model<IUser>('User', schemaUser , 'User');
+export { modelUser as User };
\ No newline at end of file
diff --git a/src/models/user/user.schema.ts b/src/models/user/user.schema.ts
new file mode 100644
index 0000000..fc73ebd
--- /dev/null
+++ b/src/models/user/user.schema.ts
@@ -0,0 +1,15 @@
+import { Schema } from 'mongoose';
+
+const schemaUser = new Schema({
+    name: { type: String, required: true },
+    password: { type: String, required: true },
+    salt: { type: String, required: true },
+    twoFASecret: { type: String, required: false },
+    lastLogin: { type: Date, required: true, default: Date.now },
+}, {
+    timestamps: {
+        createdAt: true
+    }
+});
+
+export { schemaUser }
\ No newline at end of file
diff --git a/src/routes/user.ts b/src/routes/invoice.ts
similarity index 55%
rename from src/routes/user.ts
rename to src/routes/invoice.ts
index 6c01021..9237bec 100644
--- a/src/routes/user.ts
+++ b/src/routes/invoice.ts
@@ -1,8 +1,9 @@
 import { Router } from "express";
+import { createInvoice } from "../controllers/invoice";
 
 const invoiceRouter = Router()
 
 invoiceRouter.get('/:id');
-invoiceRouter.post('/');
+invoiceRouter.post('/', createInvoice);
 
 export { invoiceRouter };
\ No newline at end of file