Feature request - Add extra ID to test

[Roni Beitelmajer]

I'm saving the tests into a postgreSQL database in order to analyze statistics over time.
Right now I'm able to do that given the IP address of the user, but I would like to have a separate ID that the user must input.

For example by doing: https://speedtest.${DOMAIN}?id=shedaim

This does not have to be authenticated. I intend to hardcode the request into an Android application.

Thanks