| check_password_reset_key() | Retrieves a user row based on password reset key and login |
| get_password_reset_key() | Creates, stores, then returns a password reset key for user. |
| is_user_logged_in() | Checks if the current visitor is a logged in user. |
| wp_authenticate() | Checks the authorization data of the registered user (login and password) and authorizes it if the check was passed. |
| wp_check_password() | Checks the plaintext password against the encrypted Password. |
| wp_get_password_hint() | Gets the text suggesting how to create strong passwords. |
| wp_login_form() | Provides a simple login form for use anywhere within WordPress. |
| wp_login_url() | Retrieves the login URL. |
| wp_loginout() | Display the Log In/Out link. |
| wp_logout() | Log the current user out. |
| wp_logout_url() | Retrieves the logout URL. |
| wp_lostpassword_url() | Returns the URL that allows the user to retrieve the lost password |
| wp_register() | Displays either the link to the dashboard ("Site Admin") if the user is logged in or "Register" link if the user is not logged in. |
| wp_registration_url() | Returns the URL that allows the user to register on the site. |
| wp_set_auth_cookie() | Authorizes (Log in) a user by ID. Sets authentication cookies based on the transmitted user ID. |
| wp_set_password() | Updates the user's password with a new encrypted one. Updates the specified password in the database and resets the user's cache. |
| wp_signon() | Authenticates and logs a user in with 'remember' capability. |