It returns a JSONFPlayer object which extends MemoryFPlayer object, so you should be able to use the MemoryFPlayer#getName method or if you want the Player object from that FPlayer use the MemoryFPlayer#getPlayer method.i see but how get nickname of FPlayer object? event.getfPlayer() returns 'com.massivecraft.factions.zcore.persist.json.JSONFPlayer@383f4750'