Add-on Login across multiple domains

[PrettyPixels]

I'd like to hire a programmer to create an add-on to securely log users in/out across the multiple domains pointed at the same board.

Once the login or logout is complete, the user should return to their original domain/spot where they initiated the login or logout.

If you're interested in this job, please DM me with the cost and time to completion. PayPal only, please.