First login to https://developer.apple.com and Click on Account
Then go to Membership, below you’ll find your Team Name “Dummy Corp.” and Team ID “CD56GBUJHY”
Since Apple are merging Developer & App Store Connect accounts, your Provider should be your Team ID
Team Id: CD56GBUJHY
Team Name: Dummy Corp.
If the build is unsuccessful due to the Provider being incorrect, contact us and we will help you find out!
Some older accounts or with multiple teams can have a Provider different of the Team ID.