How to change Visual Studio Team Services Personal Access Token

I had setup TeamCIty and had a connection to Visual Studio Team Services, but the Access Token was removed in error so I now get the Error

Unable to connect to the Visual Studio Team Services account https://fairviewinvest.visualstudio.com:
Please check that specified Personal Access Token is valid.

How can I reset to the new access Token  I have not found a way to edit the connection. I assume this should be really simple