[6.0.x] Fixed #36903 -- Fixed further NameErrors when inspecting functions with deferred annotations.

Provide a wrapper for safe introspection of user functions on Python 3.14+.

Follow-up to 601914722956cc41f1f2c53972d669ddee6ffc04.
Backport of 56ed37e17e5b1a509aa68a0c797dcff34fcc1366 from main.

1 files changed, 2 insertions, 2 deletions

diff --git a/django/contrib/auth/__init__.py b/django/contrib/auth/__init__.py
index d752e3172b..1119ef4f91 100644
--- a/django/contrib/auth/__init__.py
+++ b/django/contrib/auth/__init__.py
@@ -1,4 +1,3 @@
-import inspect
 import re
 import warnings
 
@@ -8,6 +7,7 @@ from django.core.exceptions import ImproperlyConfigured, PermissionDenied
 from django.middleware.csrf import rotate_token
 from django.utils.crypto import constant_time_compare
 from django.utils.deprecation import RemovedInDjango61Warning
+from django.utils.inspect import signature
 from django.utils.module_loading import import_string
 from django.views.decorators.debug import sensitive_variables
 
@@ -42,7 +42,7 @@ def get_backends():
 
 def _get_compatible_backends(request, **credentials):
     for backend, backend_path in _get_backends(return_tuples=True):
-        backend_signature = inspect.signature(backend.authenticate)
+        backend_signature = signature(backend.authenticate)
         try:
             backend_signature.bind(request, **credentials)
         except TypeError: