Pre migration:

1. Get Cogonito user pool configured

2. Get Admins API-Gateway configured

3. Get Admins-UI on CloudFront configured (pipeline should be done on another branch)

4. Get revalidation config PR ready and Reval API-Gateway PR ready (ready means approved, or merged and not applied yet)

5. Get UserManagement fully tested locally (or on Alpha?)(give errors to admins when user does not exist on Cognito?)

6. Give notice to all users in advance

Mid migration:

1. Give notice to users to inform the migration start

2. Restrict access of UserManagement

3. Switch Admins-UI DNS to use the app on CloudFront

4. Switch Reval to the new user pool and get Reval API-Gateway configured

5. Switch UserManagement to Cognito and release the UserManagement to users

Rollback plan:
3. If Admins-UI becomes unaccessible, switch DNS back
4. If Reval becomes unaccessible and cannot get resolved for 1(?) hour, roll back Reval and do 3
5. If UserManagement cannot be setup properly, try to find the issue and fix it withing 1-2days?

Post migration (if the migration has done)