old_contents: from rest_framework import serializers
  from stationspinner.character.models import CharacterSheet
  
  class CharacterSheetSerializer(serializers.HyperlinkedModelSerializer):
      class Meta:
          model = CharacterSheet
          exclude = ('owner', 'enabled')
  
new_contents: from rest_framework import serializers
  from stationspinner.character.models import CharacterSheet, Skill, \
      SkillInTraining, SkillQueue
  
  class SkillSerializer(serializers.ModelSerializer):
      class Meta:
          model = Skill
          exclude = ('owner',)
  
  class SkillQueueSerializer(serializers.ModelSerializer):
      class Meta:
          model = SkillQueue
          exclude = ('owner',)
  
  class SkillInTrainingSerializer(serializers.ModelSerializer):
      class Meta:
          model = SkillInTraining
          exclude = ('owner',)
  
  class CharacterSheetSerializer(serializers.HyperlinkedModelSerializer):
      skills = SkillSerializer(many=True)
      skillQueue = SkillQueueSerializer(many=True)
      skillInTraining = SkillInTrainingSerializer()
  
      class Meta:
          model = CharacterSheet
          exclude = ('owner', 'enabled', 'owner_key')
  
  
subject: Add character sheet endpoint