text: from ..models import *
  from django.contrib.auth.models import User, Group
  from rest_framework import serializers
  
  
  class UserSerializer(serializers.HyperlinkedModelSerializer):
      class Meta:
          model = User
          fields = ('url', 'username', 'email', 'groups')
  
  
  class GroupSerializer(serializers.HyperlinkedModelSerializer):
      class Meta:
          model = Group
          fields = ('url', 'name')
  
  
  class PlayerSerializer(serializers.HyperlinkedModelSerializer):
      user = UserSerializer()
  
      class Meta:
          model = Player
          # fields = ('url', 'username', 'email', 'groups')
  
  
  class ClubSerializer(serializers.HyperlinkedModelSerializer):
      class Meta:
          model = Club
          # fields = ('url', 'username', 'email', 'groups')