Follow the instructions to create apple signging certficiates:
- Visit the Apple Developer website at https://developer.apple.com and log in with your credentials.
Click on Certificates, Identifiers & Profiles, as illustrated in the following screenshot:
- Select the correct device platform you are targeting. In this case, it will be iOS, tvOS, watchOS as shown in the following screenshot:
- Navigate to Identifiers | App IDs to create an app ID, as illustrated in the following screenshot:
- Click ...