/**
 * Filter the sign up page for the levels page or default multisite page.
 *
 * @since 2.3.0
 *
 * @see pmpro_wp_signup_location
 *
 * @param string $location The location to the sign up page.
 *
 * @return string Full URL to the sign up page.
 */
apply_filters( 'pmpro_wp_signup_location', $location );