text: from django.contrib import admin
  
  from .models import User, Listing, Auction, Bid, Comment
  
  # Register your models here.
  class AuctionAdmin(admin.ModelAdmin):
      list_display = ("id", "bidding_open")
  
  
  class UserAdmin(admin.ModelAdmin):
      filter_horizontal = ("watching",)
  
  admin.site.register(User)
  admin.site.register(Listing)
  admin.site.register(Auction)
  admin.site.register(Bid)
  admin.site.register(Comment)