My apple id. Apple Says My Apple ID Does Not Exist? Get Answers Here!

All this in addition to exclusive and original content You may be prompted to enter your Apple ID password when downloading or updating apps
It says it doesn't exist It's at the bottom of the screen

Enrolling and Managing your Account in the Apple Developer App

Renewing your annual membership subscription If you enrolled through the Apple Developer app, your membership will renew as an auto-renewable subscription.

By using your Apple ID, you can personalize your online shopping experience
How to Find My Apple ID
Music, movies, TV shows, and books can be downloaded on up to 10 devices per account, five of which can be computers
My Apple ID was hacked
If your Apple ID is a third-party email address, such as gmail
As an exception, you may return Apple-branded software if you do not agree to the licensing terms; however, you may not retain or otherwise use any copies of returned software From your iPhone, iPad, or iPod touch: In iOS 10
The possible reasons behind this issue could be a failed download or a problem with your account settings in iCloud, iMessage, FaceTime, or the App Store Do not enter an alias, nickname, or company name as your legal name, as doing so will cause a delay in verification

How to Change Your Apple ID Email Address

Enter the code from your trusted device.

Your Account
Example: Seller: ABC Company, Inc
How to Recover Apple ID Password. Itunes Password Recovery
Complete purchase Review your annual membership subscription details and tap the Subscribe button
How to Find Your Apple ID (with Pictures)
Should you be unable to use your iPhone due to an unauthorized software modification, its repair will not be covered under the warranty