Custom WordPress OAuth Login Page for WP OAuth Server

gistfile1.txt

/**
 * CUSTOM LOGIN REDIRECT
 *
 * Redirect a user to a custom login page for authentication
 */
add_action( 'wo_before_authorize_method', 'custom_login_redirect' );
function custom_login_redirect() {
	if ( ! is_user_logged_in() ) {
		wp_redirect( site_url() . '/custom-login?redirect_to=' . urlencode( site_url() . $_SERVER['REQUEST_URI'] ) );
		exit;
	}
}