I am not able to sign-in to App Store or TestFlight with my Apple ID

How to Use TestFlight to Beta Test Apps on Your iPhone or iPad testflight When you add the first build of your app to a group, the build gets sent to TestFlight App Review to make sure it follows the App Store Review testflight Few steps to set up Internal Testing · Navigate back to your app in My Apps, select the TestFlight tab and click Internal Testing on the left-hand side; · Now

testflight TestFlight Essentials: Quickstart Guide for iOS Beta Testing · Set the Team and Bundle Identifier to your account · Scheme chooser with '