SuperTokens is an open source authentication solution offering features like: Different types of login: Email / password, Passwordless (OTP or Magic link based).

SuperTokens.com

I have to mention that the developer-experience is outstanding - setting up, configuration, easy-to-read-but-detailed guides, modularity, integrations. good job!

Now a question regarding Account Linking:
It's not implemented right now, but when this feature comes live - would it be possible to merge 2 existing accounts that were created by 2 different login methods into 1 account?

And yes, it would be possible to merge accounts that way.

One of the account's user IDs will get replaced with the other account's user ID

Thanks!
And the users metadata (if exists) would be theoretically merged? potentially problematic if conflicts exist. Any approach to solve this?

yea, we would provide you a callback using which you can transfer info from one user ID to the primary user ID

So you would need to write the merging logic yourself.

Great, that answered my question.
Thanks for the quick communication 🙂