The binary access token this client uses to authenticate its session for future commands.
This is a binary identifier generated to help identify and authenticate a multiplayer client to matchmaker. To associate it with a match, you must make sure that Utility.SetAccessTokenForNetwork() is given this identifier and the network ID associated with the match in question. Once you have done this, you can then make calls to the matchmaker that require its use, such as NetworkMatch.DropConnection. If the default callback MatchMakingClient functions are used for OnMatchCreate and OnMatchJoin this is set automatically.