Merge pull request #744 in RMS/api-main-service from core-dev-red-develop to RMSv2

* commit 'af0296b7':
  {dev bugfix} replace the response on non duplicate username

app/applicationlayer/management/account/views.py

@@ -55,6 +55,7 @@ class UserViewSet(viewsets.ModelViewSet):
         'email', 'contact_no'
     )
 
+    @rms.AccountValidation
     @rms.user_create
     @transaction.atomic
     def create(self, request, *args, **kwargs):

app/helper/decorators.py

@@ -82,6 +82,22 @@ class rms:
             return function(self, request, *args, **kwargs)
         return wrapper
 
+
+    @staticmethod
+    def AccountValidation(function):
+        @wraps(function)
+        def wrapper(self, request, *args, **kwargs):
+            payload = request.data
+            username = self.queryset.filter(username=payload['username'])
+            if username.count() >= 1:
+                return Response(
+                    {
+                        "message": f"{username.first().username} is already taken",
+                    },status=status.HTTP_400_BAD_REQUEST
+                )
+            return function(self, request, *args, **kwargs)
+        return wrapper
+
     @staticmethod
     def reset_password(function):
         @wraps(function)