fix: adde validation + code improvement

api/package.json

@@ -57,8 +57,7 @@
     "mongoose-sequence": "^5.3.1",
     "morgan": "^1.10.0",
     "multer": "^1.4.3",
-    "swagger-ui-express": "^4.1.6",
-    "tsoa": "3.14.1"
+    "swagger-ui-express": "^4.1.6"
   },
   "devDependencies": {
     "@types/bcryptjs": "^2.4.2",
@@ -84,6 +83,7 @@
     "supertest": "^6.1.3",
     "ts-jest": "^27.0.3",
     "ts-node": "^10.0.0",
+    "tsoa": "3.14.1",
     "typescript": "^4.3.2"
   },
   "configuration": {