Problem logging in with android

[VitamineC]

In case ivko doesn't check the steam forum regularly, there's someone having trouble logging in:

I cannot login with my account via android... it just says "not a valid account"...

So I logged in with a new account...

If I click on accounts now, there's a line that says: "If you want to login with another account you first have to".... and there's no more space... so what the ♥♥♥♥ do I have to do first?

This is annoying.