[DOCS] Document available module methods

README.md

@@ -104,6 +104,47 @@ suites:
         - EliasHaeussler\Typo3CodeceptionHelper\Codeception\Module\Backend
 ```
 
+#### Available methods
+
+**`login($username, $password): void`**
+
+Perform backend login for the given user. The user is identified
+by the given username and is authenticated by the given password.
+
+Example:
+
+```php
+$I->login('admin', 'password');
+```
+
+**`loginAs($username): void`**
+
+Perform backend login for the given user. The user is identified
+by the given username which must be configured in the codeception
+module config (see [Configure backend users](#configure-backend-users)).
+
+Example:
+
+```php
+$I->loginAs('admin');
+```
+
+**`openModule($identifier): void`**
+
+Open a backend module by clicking on the module link. The module
+link is identified by a given node identifier. Note that the
+identifier differs between TYPO3 versions (see example below).
+
+Example:
+
+```php
+// TYPO3 11
+$I->openModule('#web_list');
+
+// TYPO3 12
+$I->openModule('[data-modulemenu-identifier="web_list"]');
+```
+
 #### Configure backend users
 
 > **Note**

src/Codeception/Module/Backend.php

@@ -45,6 +45,15 @@ final class Backend extends Module
         ],
     ];
 
+    /**
+     * Perform backend login for the given user. The user is identified
+     * by the given username and is authenticated by the given password.
+     *
+     * Example
+     * =======
+     *
+     * $I->login('admin', 'password');
+     */
     public function login(string $username, string $password): void
     {
         /** @var Module\WebDriver $I */
@@ -61,6 +70,15 @@ public function login(string $username, string $password): void
     }
 
     /**
+     * Perform backend login for the given user. The user is identified
+     * by the given username which must be configured in the codeception
+     * module config.
+     *
+     * Example
+     * =======
+     *
+     * $I->loginAs('admin');
+     *
      * @param non-empty-string $username
      */
     public function loginAs(string $username): void
@@ -74,6 +92,22 @@ public function loginAs(string $username): void
         $this->login($username, $this->config['userCredentials'][$username]);
     }
 
+    /**
+     * Open a backend module by clicking on the module link. The module
+     * link is identified by a given node identifier. Note that the
+     * identifier differs between TYPO3 versions (see example below).
+     *
+     * Example
+     * =======
+     *
+     * TYPO3 11
+     * --------
+     * $I->openModule('#web_list');
+     *
+     * TYPO3 12
+     * --------
+     * $I->openModule('[data-modulemenu-identifier="web_list"]');
+     */
     public function openModule(string $identifier): void
     {
         /** @var Module\WebDriver $I */