login_link_separator : WordPress Hooks

 $http_post = ('POST' == $_SERVER['REQUEST_METHOD']);

$interim_login = isset($_REQUEST['interim-login']);

/**
 * Filters the separator used between login form navigation links.
 *
 * @since 4.9.0
 *
 * @param string $login_link_separator The separator used between login form navigation links.
 */
$login_link_separator = apply_filters( 'login_link_separator', ' | ' );

switch ($action) {

case 'postpass' :
	if ( ! array_key_exists( 'post_password', $_POST ) ) {
		wp_safe_redirect( wp_get_referer() );
		exit();
	}