Log into developer.apple.com/account
Click on Apps under App Store Connect
Click on iMrchntPOS
1. Click users and access (top right of the screen)
2. Then hit + button above users table:
3. fill in the details:
4. select developer role and do not add any additional resources:
5. Hit next button and select only access to imrchnt app:
6. That person will receive an invitation email and needs to be accepted once it will you need to add this person manually to testflight. In order to do that go to Apps (top left corner)
7. Go to imrchnt POS:
8. Click testflight
9. on the left menu bar you will see “internal testers” click it
10. Above the table click + button
11. select that person from the list
12. After this action another invitation will be sent with app link