Emergency maintenance: microco.sm domain suspended and moving to microcosm.app

I am at step 4 of this:

1. Auth0 has been updated to send from auth0@microcosm.app
   
2. Sendgrid has been configured to send from microcosm.app
   
3. Confirmed that Sendgrid can send with the new config
   
4. Re-wrote every reference in microcosm app to point microcosm.app to microcosm.app
   
   

And now I need to deploy the updated app... at this point, things will 100% guaranteed break.