User endpoints created

Invoices can now be fetched

package.json

@@ -30,6 +30,7 @@
     "jsonwebtoken": "^8.5.1",
     "mongoose": "^5.11.8",
     "mysql": "^2.18.1",
+    "socket.io": "^3.0.4",
     "ts-node": "^9.1.1",
     "typescript": "^4.1.3",
     "winston": "^3.3.3",
@@ -46,6 +47,7 @@
     "@types/mysql": "2.15.16",
     "@types/mongoose": "5.10.3",
     "@types/argon2": "0.15.0",
-    "@types/zeromq": "4.6.3"
+    "@types/zeromq": "4.6.3",
+    "@types/socket.io": "2.1.12"
   }
 }