Add manual submit_id uniqueness check as it is not enforced on server

webapp/views.py

@@ -214,6 +214,14 @@ class SignupViewSet(ModelViewSet):
             return self.partial_update(request, *args, **kwargs)
 
     def create(self, request, *args, **kwargs):
+        # Temporary manual duplicate check as submit_id uniqueness is not enforced in deployment database
+        if "submit_id" in request.data and Signup.objects.filter(
+            submit_id=request.data["submit_id"]
+        ):
+            return JsonResponse(
+                status=200, data={"message": "I heard you the first time"}
+            )
+
         id = request.data["signupForm_id"]
         try:
             answer = request.data["answer"]