To install and publish your iOS App to Apple Store, you must have an apple developer account, and create API Keys.
Follow this guide for more detail. Or execute steps below:
Step 1: Visit page https://developer.apple.com
Step 2: Select
Account and login with your apple developer account successfully:
Step 3: In
Certificates, IDs & Profiles , select the Keys option:
Step 4: Click the + icon to add a new key:
Note: 1 developer apple account can only create 2 keys, please consider before creating. But you can still delete them if needed.
Step 5: Enter the key name and select Apple Push Notification service (APNs) then click
Step 6: Click
Step 7: Click
Download to download the APNs key file
That’s all. You have created and downloaded the APNs auth key (.p8 file) and save Key ID for using later.