`callbackURL` for `emailVerification` using `sendOnSignUp: true`

How do I change the callbackURL for the email verification if my

sendOnSignUp

sendOnSignUp

sendOnSignUp

sendOnSignUp is

true

true

?

It seems I can set it if I manually trigger the verification email:

await authClient.sendVerificationEmail({
  email: "user@email.com",
  callbackURL: "/", // The redirect URL after verification
});

await authClient.sendVerificationEmail({
  email: "user@email.com",
  callbackURL: "/", // The redirect URL after verification
});

await authClient.sendVerificationEmail({
  email: "user@email.com",
  callbackURL: "/", // The redirect URL after verification
});

await authClient.sendVerificationEmail({
  email: "user@email.com",
  callbackURL: "/", // The redirect URL after verification
});

But how do I change it in the configuration?