Generates email links and OTPs to be sent via a custom email provider.
generateLink(): signup, magiclink, invite, recovery, emailChangeCurrent, emailChangeNew, phoneChange.generateLink() only generates the email link for email_change_email if the "Secure email change" setting is enabled under the "Email" provider in your Supabase project.generateLink() handles the creation of the user for signup, invite and magiclink.final res = await supabase.auth.admin.generateLink(
type: GenerateLinkType.signup,
email: 'email@example.com',
password: 'secret',
);
final actionLink = res.properties.actionLink;