Onboarding: Approve investor email not sent

[sophialittlejohn]

A user successfully verified her email on Aug 2nd (meaning emails definitely still worked then). On Sept 27th she signed a subdoc which should have sent an email to the issuer but it appears the email was never sent. There are no errors in the functions logs on that date. When checking sendgrid it appears that zero emails have been sent out in the last 30 days (red flag).

To debug this we have to fix the permissions for the demo environment. It appears that all authenticated requests to the endpoints currently fail. It's unclear why.

TODO:

1. Fix the authentication issues in the demo onboarding api (prod works fine)
2. Send an email from the API and make sure SendGrid picks it up