Django Rest Framework: Add user to team "group'' -

i have problem serializer. can create team , add existing user creates team 'group' team simultaneously. can't add users team later. i'm sending rest group name , user, receive user founded team. no changes in db.

i use django.auth user extend. relations between user , team manytomany.

should done in different way?

here code:

models.py

class user(abstractuser, guardianusermixin): pass   class team(models.model): name = models.charfield(max_length=150) users = models.manytomanyfield('webapi.user', related_name='users')      class meta:         permissions = (             ("is_team_admin", "is team admin"),             ("is_team_member", "is team member")         ) 

serializers.py

class userserializer(serializers.modelserializer): password = serializers.charfield(write_only=true)      def create(self, validated_data):         user = user(**validated_data)         user.set_password(validated_data['password'])         user.save()          return user      def update(self, instance, validated_data):         if 'password' in validated_data:             password = validated_data.pop('password')             instance.set_password(password)         return super(userserializer, self).update(instance, validated_data)      class meta:         model = user         fields = ('url', 'id', 'username', 'password', 'first_name', 'last_name')    class teamserializer(serializers.modelserializer):     users = userserializer(many=true, read_only=true)      class meta:         model = team         fields = ('url', 'id', 'name', 'users') 

views.py

class userviewset(viewsets.modelviewset):     queryset = user.objects.all()     serializer_class = userserializer      def get_permissions(self):         if self.request.method == 'post':             self.permission_classes = (permissions.allowany, )          return super(userviewset, self).get_permissions()   class teamviewset(viewsets.modelviewset):     queryset = team.objects.all()     serializer_class = teamserializer      def perform_create(self, serializer):         serializer.save(users=[self.request.user])