Call of Duty: Warzone cross platform explained - how to enable and disable cross play on PS4, Xbox and PC

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

Call of Duty Warzone 2.0 - How to See Your Activision ID

How to make an Activision account

I'm trying to make an activision account and it keeps saying invalid user. But doesn't ask for a username. Solution? : r/Warzone

I started playing the beta today and Activision automatically signed me in to some random person's account. Has this happened to anyone else? : r/modernwarfare

Saccr @ cancer PLAY WITH AN ACTIVISION ACCOUNT To play Call of Vanguard you will need to

How to recover stolen Activision account: Warzone devs offer security tips - Dexerto

Modern Warfare Activision ID: 5 Things to Know

Activision Denies Reports That 500,000 Call Of Duty Accounts Have Been Hacked

500,000 Activision accounts have been leaked