You can get agent/player(special types) but can’t get the literal name (string).
Imagine you could get strings, then you would grant best items in the game to yourself and your friends based on list of names or attack specific players based on their names. I am glad this is prevented and you cannot get the strings. Instead you can operate using agent, pass it to ui ( where it is allowed to substitute players name ), in code you can only know if the agent is the same one or not.
It would be possible to build leaderboards using the global leaderboard device (requested: Ability to add global leaderboard (top 10 players) based on a stat in the persistable data and a condition), again you should build it based on agent then you will not be able to fake stats.