I called Tesla last week and they wouldn't give me the password to the slacker account. They said they assign multiple cars to each account and thus couldn't give out the information. That seemed strange and was the first time I'd ever heard of them doing that, but I didn't argue.
Don't think this is true based on the fact that the "stations" I make show up listed on my screen. If others were using the account, their stations would show up as well.