The tech wrote it down. Seems strange to create your own account, but if Customer Service confirmed everything is in order, guess you should be good.
I'd much rather have them ask me what I'd want my login ID to be or have the option just to do it on my own time than to have a install tech who just wants to go to his next job make me an ID like "ooluser1111" and write it on a piece of paper I'll never look at again. Maybe it's just me..