return "UseAbilityMessage [id=" + this.id +
							    ", action=" + this.action +
							    ", gameId=" + this.gameId +
							    ", targets=" + this.targets.toString() + "]";

messageTypes: {
    /**
     * Login message from Client to Server.
     * <p>
     * A login message from a client to add a user to the available users on the server.
     * This login message is required before any other action or message can be performed between a client and a server.
     *
     * @param   username  the incoming user name passed from client to server, not null
     * @example Message:  <code>{ "command":"login","username":"JohnDoe" }</code>
     */
    LoginMessage: function(username) {