old_contents: from rest_framework import serializers
  
  from .models import Company
  from .models import Team
  
  
  class CompanySerializer(serializers.ModelSerializer):
      pass
  
  class TeamSerializer(serializers.ModelSerializer):
  
      class Meta:
          model = Team
          fields = '__all__'
new_contents: from rest_framework import serializers
  
  from .models import Company
  from .models import Team
  
  
  class CompanySerializer(serializers.ModelSerializer):
      class Meta:
          model = Company
          fields = '__all__'
  
  class TeamSerializer(serializers.ModelSerializer):
  
      class Meta:
          model = Team
          fields = '__all__'
subject: implement company serializer