Method to check the valid user for the project area

Hello all,

We have developed one tool which uses RTC plugins.

Is there any API method i can check whether the user has valid authentication to login into the RTC server by server name, username, password and project area.

Currently i have to retrieve all users from the project area by passing server name and project area then loop through each user and checking whether the user is valid to login into the project area. It's taking more time to login into the my tool.

Thanks.