Hello,

I've been searching for a way to implement a referral system within Next-Auth and run into some road blocks. I've searched all over online and in this community section to no avail.

I was expecting to do something like this

signIn('google',
	{ callbackUrl: window && window.location.pathname.split('?')[0] + `?ref=${localStorage.getItem('Referral-Code')}`, referral: localStorage.getItem('Referral-Code') || '' },
	{ referral: localStorage.getItem('Referral-Code') || '' }
)

and access the referral code either in the req object in [...nextAuth].ts or have the referral property exposed in one of the callbacks but that doesn't seem to be the case. So there's no possible way to access that code and create a referral database record associating the user to that code.

It's also a bit painful as for newly created account I need to create new database records for them. I figure out if they're a new user by looking for those records which adds latency to the auth process.

I have found some talk about this here but as I commented below it doesn't seem possible.

Thank you!!