try restore

chat/serializers.py

@@ -3,7 +3,6 @@ from rest_framework import serializers
 from profiles.models import ProfileModel
 
 from .models import ChatChannelModel, ChatMessageModel
-from typing import List
 
 class ChatChannelSerializer(serializers.ModelSerializer):
 
@@ -14,7 +13,7 @@ class ChatChannelSerializer(serializers.ModelSerializer):
         fields = ["members_id", "pk"]
 
     def validate_members_id(self, value):
-        members_id: List[int] = value
+        members_id: [int] = value
         if len(members_id) < 2:
             raise serializers.ValidationError('Not enought members to create the channel')
         if len(set(members_id)) != len(members_id):