Do all Activision accounts have numbers?

How to Add Friends with Crossplay!

So I just got warzone, and I need to create an Activision account, as this is the first time it's required. I try to enter in my information, but it says invalid

ModernWarzone on X: When first signing in to Warzone after the Season 2 Reloaded update your private information will be shown on screen. Email, Activision ID and Display name are all shown.

Using Two-Factor Authentication with an Activision Account

Error Connecting to Activision Account: 5 Ways to Fix It

Keeping your Activision Account Secure

Call of Duty: Mobile News 📲 on X: Activision is giving Ghost - Stealth for linking your Activision account. / X

Warzone Mobile™ on X: Link Your Activision Account ( Warzone Mobile Login ) To Obtain #CODnext Watch And Earn Rewards / X

Call of Duty: Warzone Stuck logging in to Activision account fix - GameRevolution

500,000 Activision accounts have been leaked