Substitute hardcoded auth modes for variables

backend/src/routes/v1/user.ts

@@ -2,11 +2,14 @@ import express from 'express';
 const router = express.Router();
 import { requireAuth } from '../../middleware';
 import { userController } from '../../controllers/v1';
+import {
+    AUTH_MODE_JWT
+} from '../../variables';
 
 router.get(
     '/', 
     requireAuth({
-        acceptedAuthModes: ['jwt']
+        acceptedAuthModes: [AUTH_MODE_JWT]
     }), 
     userController.getUser
 );