old_contents: from django.db import models
  from users.models import User
  
  class Company(models.Model):
      name = models.CharField(max_length=250, unique=True)
      owner = models.ForeignKey(User)
  
  class Team(models.Model):
  	name = models.CharField(max_length=250, unique=True)
new_contents: from django.db import models
  from ..users.models import User
  
  class Company(models.Model):
      name = models.CharField(max_length=250, unique=True)
      owner = models.ForeignKey(User)
  
  class Team(models.Model):
  	name = models.CharField(max_length=250, unique=True)
subject: fix models import