old_contents: # -*- coding: utf-8 -*-
  from django.core.checks import Error, Warning, register
  from django.conf.global_settings import AUTH_USER_MODEL as DEFAULT_AUTH_USER_MODEL
  from django.conf import settings
  from django.contrib.admin.sites import site
  from django.contrib.auth import get_user_model
  
  from hijack import settings as hijack_settings
  from hijack_admin.admin import HijackUserAdminMixin
  
  
  def _using_hijack_admin_mixin():
      user_admin_class = type(site._registry.get(get_user_model(), None))
      return issubclass(user_admin_class, HijackUserAdminMixin)
  
  
  def check_get_requests_allowed(app_configs, **kwargs):
      errors = []
      if not hijack_settings.HIJACK_ALLOW_GET_REQUESTS:
          errors.append(
              Error(
                  'Hijack GET requests must be allowed for django-hijack-admin to work.',
                  hint='Set HIJACK_ALLOW_GET_REQUESTS to True.',
                  obj=None,
                  id='hijack_admin.E001',
              )
          )
      return errors
  
  
  def check_custom_user_model(app_configs, **kwargs):
      warnings = []
      if (settings.AUTH_USER_MODEL != DEFAULT_AUTH_USER_MODEL and
              not _using_hijack_admin_mixin()):
          warnings.append(
              Warning(
                  'django-hijack-admin does not work out the box with a custom user model.',
                  hint='Please mix HijackUserAdminMixin into your custom UserAdmin.',
                  obj=settings.AUTH_USER_MODEL,
                  id='hijack_admin.W001',
              )
          )
      return warnings
  
  
  def register_checks():
      for check in [
          check_get_requests_allowed,
          check_custom_user_model,
      ]:
          register(check)
  
new_contents: # -*- coding: utf-8 -*-
  from django.core.checks import Error, Warning, register
  from django.conf.global_settings import AUTH_USER_MODEL as DEFAULT_AUTH_USER_MODEL
  from django.conf import settings
  from django.contrib.admin.sites import site
  from django.contrib.auth import get_user_model
  
  from hijack import settings as hijack_settings
  from hijack_admin.admin import HijackUserAdminMixin
  
  
  def _using_hijack_admin_mixin():
      user_admin_class_name = getattr(
          settings, 'HIJACK_USER_ADMIN_CLASS_NAME', None)
  
      if user_admin_class_name:
          user_admin_class = user_admin_class_name
      else:
          user_admin_class = type(site._registry.get(get_user_model(), None))
  
      return issubclass(user_admin_class, HijackUserAdminMixin)
  
  
  def check_get_requests_allowed(app_configs, **kwargs):
      errors = []
      if not hijack_settings.HIJACK_ALLOW_GET_REQUESTS:
          errors.append(
              Error(
                  'Hijack GET requests must be allowed for django-hijack-admin to work.',
                  hint='Set HIJACK_ALLOW_GET_REQUESTS to True.',
                  obj=None,
                  id='hijack_admin.E001',
              )
          )
      return errors
  
  
  def check_custom_user_model(app_configs, **kwargs):
      warnings = []
      if (settings.AUTH_USER_MODEL != DEFAULT_AUTH_USER_MODEL and
              not _using_hijack_admin_mixin()):
          warnings.append(
              Warning(
                  'django-hijack-admin does not work out the box with a custom user model.',
                  hint='Please mix HijackUserAdminMixin into your custom UserAdmin.',
                  obj=settings.AUTH_USER_MODEL,
                  id='hijack_admin.W001',
              )
          )
      return warnings
  
  
  def register_checks():
      for check in [
          check_get_requests_allowed,
          check_custom_user_model,
      ]:
          register(check)
  
subject: Add the possibility to configure the admin class name.