Change record status: 
Project: 
Introduced in branch: 
8.x
Description: 

A couple of user.module functions got converted to controllers/proper forms:

Drupal 7 Drupal 8
user_login_form() \Drupal\user\Form\UserLoginForm
user_page() \Drupal\user\Controller\UserController::userPage()
user_login_finalize(&$edit = array()) user_login_finalize(AccountInterface $account)
user_login_name_validate() \Drupal\user\Form\UserLoginForm::validateName()
user_login_authenticate_validate() \Drupal\user\Form\UserLoginForm::validateAuthentication()
user_login_final_validate() \Drupal\user\Form\UserLoginForm::validateFinal()
Impacts: 
Module developers
Updates Done (doc team, etc.)
Online documentation: 
Not done
Theming guide: 
Not done
Module developer documentation: 
Not done
Examples project: 
Not done
Coder Review: 
Not done
Coder Upgrade: 
Not done
Other: 
Other updates done