fixed PasswordResetSerializer

apps/account/serializers/web.py

@@ -15,6 +15,9 @@ class PasswordResetSerializer(serializers.ModelSerializer):
         """Meta class"""
         model = models.ResetPasswordToken
         fields = ('expiry_datetime', )
+        read_only_fields = [
+            'expiry_datetime',
+        ]
 
     def create(self, validated_data, *args, **kwargs):
         """Override create method"""