old_contents: from django.db import models
  
  from abacus_edu.behaviors import Timestampable
  
  
  class Client(Timestampable, models.Model):
      token = models.TextField(
          verbose_name="토큰값",
      )
  
      def __str__(self):
          return self.token[:10]
  
      class Meta:
          verbose_name = "Client"
          verbose_name_plural = "Client"
  
new_contents: from django.db import models
  
  from abacus_edu.behaviors import Timestampable
  
  
  class Client(Timestampable, models.Model):
      token = models.TextField(
          verbose_name="토큰값",
      )
      like_video_set = models.ManyToManyField(
          'Video',
          related_name="liked_by_set",
      )
  
      def __str__(self):
          return self.token[:10]
  
      class Meta:
          verbose_name = "Client"
          verbose_name_plural = "Client"
  
subject: add like_video_set field in Client model