bp_login_redirector()

function bp_login_redirector() {
	// Redirect links must include the `redirect_to` and `bp-auth` parameters.
	if ( empty( $_GET['redirect_to'] ) || empty( $_GET['bp-auth'] ) ) {
		return;
	}

	/*
	 * If the user is already logged in,
	 * skip the login form and redirect them to the content.
	 */
	if ( bp_loggedin_user_id() ) {
		wp_safe_redirect( esc_url_raw( $_GET['redirect_to'] ) );
		exit;
	}
}