1. Go to the Apple Developer site at https://developer.apple.com. If you haven't created an Apple Developer account, you can do so now.
  2. Click Certificates, Identifiers & Profiles.
  3. On the left, click Identifiers and then click the + icon.
  4. In the Register a New Identifier section, select App IDs.
  5. In the Register an App ID section, enter a value for the Bundle ID.
  6. Copy the following values to a secure location:
    • App ID prefix: (Team ID). Identifies your team or organization.
    • Bundle ID: Identifies a group of applications.
  7. In the list of available capabilities, select Sign in with Apple.
  8. Click Continue and Register.