old_contents: from django.contrib import admin
  from mysite.bridie.models import User
  
  # Register your models here.
  class UserAdmin(admin.ModelAdmin):
  	pass
  admin.site.register(User, UserAdmin)
  
new_contents: from django.contrib import admin
  from mysite.bridie.models import User, Post
  
  # Register your models here.
  class UserAdmin(admin.ModelAdmin):
  	pass
  class PostAdmin(admin.ModelAdmin):
  	pass
  admin.site.register(User, UserAdmin)
  admin.site.register(Post, PostAdmin)
  
subject: Add Post to admin