WordPress at a glance
action is not described

retrieve_password_key action-hook . WP 2.5.0

Fires when a password reset key is generated.

Usage

add_action( 'retrieve_password_key', 'action_function_name_5132', 10, 2 );
function action_function_name_5132( $user_login, $key ){
	// action...
}
$user_login(string)
The username for the user.
$key(string)
The generated password reset key.

Where the hook is called

get_password_reset_key()
wp_new_user_notification()
wp-includes/user.php 2196
do_action( 'retrieve_password_key', $user->user_login, $key );
wp-includes/pluggable.php 1888
do_action( 'retrieve_password_key', $user->user_login, $key );

Where the hook is used (in WP core)

Does not used.