Do not handle password resets and changes for non-LDAP users

aleksis/apps/ldap/util/ldap_password.py

@@ -21,6 +21,10 @@ def ldap_change_password(request, user, **kwargs):
 
         user.ldap_user = _LDAPUser(LDAPBackend(), user=user)
 
+    if not user.ldap_user.dn:
+        # The user is not linked to an LDAP user, so we do not handle the password change
+        return
+
     # Get old and new password from submitted form
     # We rely on allauth already having validated the form before emitting the signal
     old = request.POST.get("oldpassword", None)