old_contents: from django.contrib import admin
  from django.contrib.auth import get_user_model
  
  from import_export import resources
  from import_export.admin import ExportMixin
  
  
  User = get_user_model()
  
  
  class UserResource(resources.ModelResource):
      class Meta:
          model = User
          fields = ('id', 'first_name', 'last_name', 'email', 'mozillians_url')
  
  
  class UserAdmin(ExportMixin, admin.ModelAdmin):
      resource_class = UserResource
      list_display = ('username', 'email', 'first_name', 'last_name', 'is_staff')
  
      class Meta:
          model = User
  
  
  admin.site.register(User, UserAdmin)
  
new_contents: from django.contrib import admin
  from django.contrib.auth import get_user_model
  
  from import_export import resources
  from import_export.admin import ExportMixin
  
  
  User = get_user_model()
  
  
  class UserResource(resources.ModelResource):
      class Meta:
          model = User
          fields = ('id', 'first_name', 'last_name', 'email', 'mozillians_url')
  
  
  class UserAdmin(ExportMixin, admin.ModelAdmin):
      resource_class = UserResource
      list_display = ('username', 'email', 'first_name', 'last_name', 'is_staff')
      search_fields = ['username', 'email', 'first_name', 'last_name']
  
      class Meta:
          model = User
  
  
  admin.site.register(User, UserAdmin)
  
subject: Add search filter for users in admin interface.