Disable signups AFTER containers been built

[rotemrevivo91]

I'm running a self-hosted environment where I successfully create an admin user on build time by sending a POST request to https://mysupabase/auth/v1/signup. After creating the user I need to disable user signups to my website.
Unfortunately, in a self-hosted environment this setting is decided by an env variable on build time, and when accessing https://studio/project/default/auth/settings and toggling Enable Email Signup an error message appears that PATCH is not enabled.
The call is going to /api/auth/default/config and when trying to recreate the call manually with curl as follows:
curl -X PATCH -H "apikey: SERVICE_ROLE_KEY \ -H Content-Type: application/json \ -H "Authorization: Bearer SERVICE_ROLE_KEY \ -d '{"EXTERNAL_EMAIL_ENABLED":false}' \ https://.../project/default/auth/settings
I get an error message 401 Unauthorized.

Anyone knows if its possible atm or if i'm doing something wrong?
Thanks!