I installed the test client to try it out but it only gives the option to manually login(I am a steam user)
And now I went back to regular sk to play with a friend and it is doing the same thing. I am about to uninstall and re download only the normal sk which should fix it.
After uninstalling both the test client and the normal client and then redownloading from steam I am still unable to login with steam account.
The check box is missing and only has the boxes to put login information and login as guest.
Gonna restart steam XD
EDIT: restarting steam fixed the issue but I do not know if this would fix the test client issue of not letting me login.