Create a new app in AppStore Connect
Goto your apple developer account from this link
Click on the + button to create a new app
Fill in the details and the bundle id & sku as provided by the Nunify team and click on Create
Give App Manager access to the newly created app to Nunify Team
Goto the users & access page in your apple developer account from this link
Click on the + button to add a new user
Enter the below details in the form:
First Name: App
Last Name: Nunify
Email: [email protected]
Choose App Manager permission
And select the App that you created in the above step in Apps dropdown.