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

SuperTokens.com

Hi, is there a way for me to call `UserId Mapping` method using the Go SDK and not an API?

https://supertokens.com/docs/thirdparty/migration/account-creation/user-id-mapping

unknown

And if there is, what's the way to retrieve it too?

Or is it just better if I create the mapping in my database?

There is a function https://pkg.go.dev/github.com/supertokens/supertokens-golang/supertokens