Is this what you are looking for?
[17:30:35] [User Authenticator #7/INFO]: UUID of player ncsouthpaw is 3153da02-0545-4d5f-b117-15522239f69f
[17:30:36] [Server thread/INFO]: ncsouthpaw[/192.168.1.141:53089] logged in with entity id 847545 at (98.5026800624384, 70.0, -2737.547384299309)...