Theo's Typesafe Cult•2y ago

How to do something on register (sign up) in NextAuth?!

There's only signIn callback, and I haven't found a way to check if the user is signing in for the first time. I want to send a "thank you for registering" email. How do I do it?

6 Replies

cje•2y ago

add a database field (or separate table) and check for that

jdsl•2y ago

There is a variable for the jwt callback called isNewUser that might work: https://next-auth.js.org/configuration/callbacks#jwt-callback

Callbacks | NextAuth.js

Callbacks are asynchronous functions you can use to control what happens when an action is performed.

jdsl•2y ago

The answer cje provided is probably the full-proof way

The contents user, account, profile and isNewUser will vary depending on the provider and if you are using a database.

The contents user, account, profile and isNewUser will vary depending on the provider and if you are using a database.

aspireoneOP•2y ago

I have nowhere to add it if I cannot do something on register right? Il'l try doing it through JWT as joerambo suggested

cje•2y ago

signIn() {
  const userDoneRegistering = something();
  if (!userDoneRegistering) {
    doUserRegistrationStuff();
  }
}

doUserRegistrationStuff() {
  doStuff();
  setUserDoneRegistering();
}

signIn() {
  const userDoneRegistering = something();
  if (!userDoneRegistering) {
    doUserRegistrationStuff();
  }
}

doUserRegistrationStuff() {
  doStuff();
  setUserDoneRegistering();
}

aspireoneOP•2y ago

Where would that flag be stored according to you Well, the JWT way works. The isNewUser field is not set for signin using CredentialsProvider, but I'm alright with that. Thank you both for helping me, appreciate it.

Gaming

Programming

How to do something on register (sign up) in NextAuth?!