Request for feature: Ability to use custom HTML template in supabase.auth calls

Hey 😄 I'd love for there to be a way to send custom dynamic email HTML when making auth calls (e.g. supabase.auth.signUp). The built-in HTML editor doesn't provide enough customisation, since I'd like to be able to include dynamic content which is generated by my end users (i.e. adding their logo, company name, etc).

An example of this could look like:



So you can still access existing variables which exist in the Supabase email templates ({{.ConfirmationURL}}), but I can also send my own dynamic data.

Thank you 🙏