...
Note: LAC does not support concurrent logins using the same user credentials. If a user logs into LAC using the same username and password that were already used to log into another machine, the previously logged-in user will be signed out of LAC automatically. The same rule applies to both browser sessions and sessions using SOAP API tokens. For example, if the user that is currently logged into the LAC login page attempts to log into LAC again using SOAP API and the same credentials as he used to log into the current session, he will be automatically signed out from the session in the browser despite the fact that the SOAP API token created by the Login function is valid for 3 hours.
To create a new user:
...