Hi! There is no actual way to save your Google or Facebook login details at the moment as we do not have the right to create that feature without Google or Facebook's permission. However, you can bind an email to the account so that you can save your login details to be used in the mini client.

You can bind an email to your account through the User Center: Found Here.

~Jib

Hi! Did you by chance accidentally bind the wrong email to the account?

~Jib