Signing up is easy! All you need is a Mixer account and a smash.gg account.
First, create your Mixer account if you don't have one.
You'll be able to create your smash.gg account as you sign up if you don't have one already.
From this point you'll be guided to connect your Mixer and smash.gg accounts together. From there, all you have to do is stream your gameplay!
If you have any trouble please reach out to firstname.lastname@example.org.