Where should I place the "Stay signed in" checkbox?

I'm new to this community and it might be that this question is off-topic; feel free to suggest me to delete this post, if so.

I've gazed at this OAuth pre-login window I created for quite a while, of which I'm pleased. Except for the "Stay signed in" checkbox that looks misplaced.

I just can't pinpoint what's wrong here.

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