insert_user_meta
Filter Hook: Filters a user’s meta values and keys immediately after the user is created or updated and before any user meta is inserted or updated.
Source: wp-includes/user.php:2428
username_exists
Filter Hook: Filters whether the given username exists.
Source: wp-includes/user.php:1971
profile_update
Action Hook: Fires immediately after an existing user is updated.
Source: wp-includes/user.php:2482
email_exists()
Function: Determines whether the given email exists.
Source: wp-includes/user.php:1986
user_register
Action Hook: Fires immediately after a new user is registered.
Source: wp-includes/user.php:2515
validate_username()
Function: Checks whether a username is valid.
Source: wp-includes/user.php:2015
wp_update_user()
Function: Updates a user in the database.
Source: wp-includes/user.php:2537
validate_username
Filter Hook: Filters whether the provided username is valid.
Source: wp-includes/user.php:2027
send_password_change_email
Filter Hook: Filters whether to send the password change email.
Source: wp-includes/user.php:2581
setup_userdata()
Function: Sets up global user vars.
Source: wp-includes/user.php:1520