old_contents: from django.contrib import admin
  from .models import *
  
  
  admin.site.register(Message)
  admin.site.register(Response)
  admin.site.register(Account)
  
new_contents: from django.contrib import admin
  from .models import *
  
  
  class MessageAdmin(admin.ModelAdmin):
      list_display = ('to_phone_number', 'from_phone_number', 'status', 'date_sent')
      list_display_links = list_display
      list_filter = ('status', 'date_sent')
      date_hierarchy = 'date_sent'
      ordering = ('-date_sent', )
  
  
  class ResponseAdmin(admin.ModelAdmin):
      list_display = ('action', 'active', 'body', 'date_updated')
      list_display_links = list_display
      list_filter = ('action', 'active')
  
  
  class AccountAdmin(admin.ModelAdmin):
      list_display = ('friendly_name', 'owner_account_sid', 'account_type', 'status', 'date_updated')
      list_display_links = list_display
  
  
  admin.site.register(Message, MessageAdmin)
  admin.site.register(Response, ResponseAdmin)
  admin.site.register(Account, AccountAdmin)
  
subject: Improve admin display