Note you will need to create an Apple Developer account and enroll in the developer program.
Log in to your Apple developer account and click on Certificates, Identifiers & Profiles
Select Identifiers from the panel on the left and click on +
Select App IDs and click on Continue
Select a type
Enter your app name under Description
Copy and paste the Bundle ID that was generated on the AppsPlate
Click Continue
Now you’ll be asked to Confirm your App ID.
Click on Register to confirm the app identifier that you’ve created
Your App Identifier has been created