old_contents: from rest_framework import serializers
  from django.contrib.auth import get_user_model
  
  
  class TimtecUserSerializer(serializers.ModelSerializer):
      name = serializers.Field(source='get_full_name')
      picture = serializers.Field(source='get_picture_url')
  
      class Meta:
          model = get_user_model()
          fields = ('id', 'username', 'name', 'first_name', 'last_name', 'biography', 'picture',)
  
  
  class TimtecUserAdminSerializer(TimtecUserSerializer):
  
      class Meta:
          model = get_user_model()
          fields = ('id', 'username', 'name', 'email', 'is_active', 'is_superuser', 'first_name', 'last_name',)
  
new_contents: from rest_framework import serializers
  from django.contrib.auth import get_user_model
  
  
  class TimtecUserSerializer(serializers.ModelSerializer):
      name = serializers.Field(source='get_full_name')
      picture = serializers.Field(source='get_picture_url')
      is_profile_filled = serializers.BooleanField(source='is_profile_filled')
  
      class Meta:
          model = get_user_model()
          fields = ('id', 'username', 'name', 'first_name', 'last_name',
                    'biography', 'picture', 'is_profile_filled')
  
  
  class TimtecUserAdminSerializer(TimtecUserSerializer):
  
      class Meta:
          model = get_user_model()
          fields = ('id', 'username', 'name', 'email', 'is_active', 'is_superuser', 'first_name', 'last_name',)
  
subject: add profile test to serializer