old_contents: from django.contrib import admin
  from clowder_account.models import ClowderUser, ClowderUserAdmin
  from clowder_server.models import Alert, Ping
  
  admin.site.register(Alert)
  admin.site.register(ClowderUser, ClowderUserAdmin)
  admin.site.register(Ping)
  
new_contents: from django.contrib import admin
  from clowder_account.models import ClowderUser, ClowderUserAdmin
  from clowder_server.models import Alert, Ping
  
  admin.site.register(Alert)
  admin.site.register(ClowderUser, ClowderUserAdmin)
  
  @admin.register(Ping)
  class PingAdmin(admin.ModelAdmin):
      list_filter = ('user',)
  
subject: Add list filter for searching