After creating a member that person needs to sign up for a Tremendous account manually. You can either use the invite_url parameter from the response and pass that on to the person manually as their individual sign-up-link. Or you can set the invite parameter to true in the request and we will send an invite via email automatically.
Automatic invitations are not available in the sandbox
You must manually use the returned invite_url instead.
Click Try It! to start a request and see the response here!