abase.   
[ wp_get_user_contact_methods() ](https://developer.wordpress.org/reference/functions/wp_get_user_contact_methods/) ` wp-includes/user.php ` |  Sets up the user contact methods.   
[ check_password_reset_key() ](https://developer.wordpress.org/reference/functions/check_password_reset_key/) ` wp-includes/user.php ` |  Retrieves a user row based on password reset key and login.   
[ register_new_user() ](https://developer.wordpress.org/reference/functions/register_new_user/) ` wp-includes/user.php ` |  Handles registering a new user.   
[ username_exists() ](https://developer.wordpress.org/reference/functions/username_exists/) ` wp-includes/user.php ` |  Determines whether the given username exists.   
[ email_exists() ](https://developer.wordpress.org/reference/functions/email_exists/) ` wp-includes/user.php ` |  Determines whether the given email exists.   
[ validate_username() ](https://developer.wordpress.org/reference/functions/validate_username/) ` wp-includes/user.php ` |  Checks whether a username is valid.   
[ wp_insert_user() ](https://developer.wordpress.org/reference/functions/wp_insert_user/) ` wp-includes/user.php ` |  Inserts a user into the database.   
[ get_blogs_of_user() ](https://developer.wordpress.org/reference/functions/get_blogs_of_user/) ` wp-includes/user.php ` |  Gets the sites a user belongs to.   
[ count_users() ](https://developer.wordpress.org/reference/functions/count_users/) ` wp-includes/user.php ` |  Counts number of users who have each of the user roles.   
[ wp_dropdown_users() ](https://developer.wordpress.org/reference/functions/wp_dropdown_users/) ` wp-includes/user.php ` |  Creates dropdown HTML content of users.   
[ sanitize_user_field() ](https://developer.wordpress.org/reference/functions/sanitize_user_field/) ` wp-includes/user.php ` |  Sanitizes user field based on context.   
[ wp_signon() ](https://developer.wordpress.org/reference/functions/wp_signon/) ` wp-includes/user.php ` |  Authenticates and logs a user in with ‘remember’ capability.   
[ wp_authenticate_username_password() ](https://developer.wordpress.org/reference/functions/wp_authenticate_username_password/) ` wp-includes/user.php ` |  Authenticates a user, confirming the username and password are valid.   
[ wp_authenticate_spam_check() ](https://developer.wordpress.org/reference/functions/wp_authenticate_spam_check/) ` wp-includes/user.php ` |  For Multisite blogs, checks if the authenticated user has been marked as a spammer, or if the user’s primary blog has been marked as spam.   
[ count_user_posts() ](https://developer.wordpress.org/reference/functions/count_user_posts/) ` wp-includes/user.php ` |  Gets the number of posts a user has written.   
[ get_user_option() ](https://developer.wordpress.org/reference/functions/get_user_option/) ` wp-includes/user.php ` |  Retrieves user option that can be either per Site or per Network.   
[ wp_list_bookmarks() ](https://developer.wordpress.org/reference/functions/wp_list_bookmarks/) ` wp-includes/bookmark-template.php ` |  Retrieves or echoes all of the bookmarks.   
[ get_query_template() ](https://developer.wordpress.org/reference/functions/get_query_template/) ` wp-includes/template.php ` |  Retrieves path to a template.   
[ WP_Image_Editor_GD::_save() ](https://developer.wordpress.org/reference/classes/wp_image_editor_gd/_save/) ` wp-includes/class-wp-image-editor-gd.php ` |   
[ Walker_Nav_Menu::start_el() ](https://developer.wordpress.org/reference/classes/walker_nav_menu/start_el/) ` wp-includes/class-walker-nav-menu.php ` |  Starts the element output.   
[ has_post_thumbnail() ](https://developer.wordpress.org/reference/functions/has_post_thumbnail/) ` wp-includes/post-thumbnail-template.php ` |  Determines whether a post has an image attached.   
[ get_post_thumbnail_id() ](https://developer.wordpress.org/reference/functions/get_post_thumbnail_id/) ` wp-includes/post-thumbnail-template.php ` |  Retrieves the post thumbnail ID.   
[ get_the_post_th