Added import system

app/Models/User.php

@@ -64,8 +64,11 @@ class User extends Authenticatable
      * @var array<string, string>
      */
     protected $casts = [
+        'name' => 'string',
+        'email' => 'string',
         'email_verified_at' => 'datetime',
         'is_admin' => 'boolean',
+        'is_placeholder' => 'boolean',
     ];
 
     /**