Logging in using a different PC

I have no idea if I'm even in the right place.

I need a friend to cover for me and to launch the Zoom meeting, which means them logging into the account. They can't seem to do this. I have even bought a new licence and applied it to them. I am away on holiday with no signal so cannot log in and hand host over. Zoom CS is beyond hopeless so here we are. Can someone here help me please...someone...thx