restrict client connections to virtualhere server

Hi everyone!  Sorry for what is probably a very basic question to folks here, but here goes...

Running a virtualhere server at home.  I have my firewall rules set and I can connect to my dongle (plugged into my virtualhere server at home) remotely.

Is there a way to create a username and password to the virtualhere server so I can be the only one to connect to the virtualhere server and attach to my dongle remotely?

Thanks!