bp_get_loggedin_user_username()

	function bp_get_loggedin_user_username() {
		$bp = buddypress();

		if ( bp_loggedin_user_id() ) {
			$username = bp_core_get_username( bp_loggedin_user_id(), $bp->loggedin_user->userdata->user_nicename, $bp->loggedin_user->userdata->user_login );
		} else {
			$username = '';
		}

		/**
		 * Filters the username of the logged-in user.
		 *
		 * @since BuddyPress 1.2.0
		 *
		 * @param string $username Username of the logged-in user.
		 */
		return apply_filters( 'bp_get_loggedin_user_username', $username );
	}