fix validation error

app/Http/Controllers/Auth/RegisterController.php

@@ -64,15 +64,17 @@ class RegisterController extends Controller
         $marking = Marking::Where('email',$data['email'])->first();
 
         if(!$marking){
-            return response()->json('Does not exist ', 400);
+            return response()->json(["message"=>"Does not exist"], 400);
         }
         if($marking->marking != $data['marking']){
-            return response()->json('Incorrect marking', 400);   
+            return response()->json(["message"=>"Incorrect marking"], 400);   
         }
         
         if(User::Where('email',$data['email'])->first()){
-            return response()->json('Email already exist in the system', 400);      
+            return response()->json(["message"=>"Email already exist in the system"], 400);      
         }
+
+        
         
         $role = Role::where('name','=','member')->first();
         $user = new User();