Logging In And Out
TeamCity plugin commands are only available when you are logged in to a build server. If the connection is not established, the status bar displays the 
icon, and the TeamCity tool window displays an invitation to log in. Once logged in to a build server, you can log out and then log in to another one, using the / commands on the main menu.
To log in to TeamCity server
On the main menu, choose , or click the
button in the status bar.In the dialog, specify the URL of the desired build server. You can type the URL, or select one from the history list of recent entries.
In the Login and Password fields, specify your account information, which you can get from the TeamCity administrator.
Click OK.