For the googlers, here is a full list of routes that are getting generated by Auth::routes(); in Laravel >= 5.4

// Authentication Routes...
Route::get('login', [
  'as' => 'login',
  'uses' => 'Auth\LoginController@showLoginForm'
]);
Route::post('login', [
  'as' => '',
  'uses' => 'Auth\LoginController@login'
]);
Route::post('logout', [
  'as' => 'logout',
  'uses' => 'Auth\LoginController@logout'
]);

// Password Reset Routes...
Route::post('password/email', [
  'as' => 'password.email',
  'uses' => 'Auth\ForgotPasswordController@sendResetLinkEmail'
]);
Route::get('password/reset', [
  'as' => 'password.request',
  'uses' => 'Auth\ForgotPasswordController@showLinkRequestForm'
]);
Route::post('password/reset', [
  'as' => 'password.update',
  'uses' => 'Auth\ResetPasswordController@reset'
]);
Route::get('password/reset/{token}', [
  'as' => 'password.reset',
  'uses' => 'Auth\ResetPasswordController@showResetForm'
]);

// Registration Routes...
Route::get('register', [
  'as' => 'register',
  'uses' => 'Auth\RegisterController@showRegistrationForm'
]);
Route::post('register', [
  'as' => '',
  'uses' => 'Auth\RegisterController@register'
]);

php artisan route:list will return

+--------+----------+------------------------+------------------+------------------------------------------------------------------------+--------------+
| Domain | Method   | URI                    | Name             | Action                                                                 | Middleware   |
+--------+----------+------------------------+------------------+------------------------------------------------------------------------+--------------+
|        | GET|HEAD | login                  | login            | App\Http\Controllers\Auth\LoginController@showLoginForm                | web,guest    |
|        | POST     | login                  |                  | App\Http\Controllers\Auth\LoginController@login                        | web,guest    |
|        | POST     | logout                 | logout           | App\Http\Controllers\Auth\LoginController@logout                       | web          |
|        | POST     | password/email         | password.email   | App\Http\Controllers\Auth\ForgotPasswordController@sendResetLinkEmail  | web,guest    |
|        | GET|HEAD | password/reset         | password.request | App\Http\Controllers\Auth\ForgotPasswordController@showLinkRequestForm | web,guest    |
|        | POST     | password/reset         | password.update  | App\Http\Controllers\Auth\ResetPasswordController@reset                | web,guest    |
|        | GET|HEAD | password/reset/{token} | password.reset   | App\Http\Controllers\Auth\ResetPasswordController@showResetForm        | web,guest    |
|        | GET|HEAD | register               | register         | App\Http\Controllers\Auth\RegisterController@showRegistrationForm      | web,guest    |
|        | POST     | register               |                  | App\Http\Controllers\Auth\RegisterController@register                  | web,guest    |
+--------+----------+------------------------+------------------+------------------------------------------------------------------------+--------------+

You can also try this one.

// Replace admin with whatever prefix you need

Route::group(['prefix' => 'admin'], function () {

    Auth::routes();

});

You can see list of routes by following command.

php artisan route:list

Routes for 5.5 LTS (Confirmed) / 5.6 (Confirmed) / 5.7 (?)

Can someone confirm it works with 5.7?

// Authentication Routes...
Route::get('login', 'Auth\LoginController@showLoginForm')->name('login');
Route::post('login', 'Auth\LoginController@login');
Route::post('logout', 'Auth\LoginController@logout')->name('logout');

// Registration Routes...
Route::get('register', 'Auth\RegisterController@showRegistrationForm')->name('register');
Route::post('register', 'Auth\RegisterController@register');

// Password Reset Routes...
Route::get('password/reset', 'Auth\ForgotPasswordController@showLinkRequestForm')->name('password.request');
Route::post('password/email', 'Auth\ForgotPasswordController@sendResetLinkEmail')->name('password.email');
Route::get('password/reset/{token}', 'Auth\ResetPasswordController@showResetForm')->name('password.reset');
Route::post('password/reset', 'Auth\ResetPasswordController@reset');