How do I connect my existing paramount plus subscription to my apple tv app on my vizio tv?

How do I stream on paramountplus.com or the Paramount+ app, via Apple TV channels?

If you've signed up for Paramount+ via Apple TV channels, just go to paramountplus.com/apple. You will have to verify your Apple ID on paramountplus.com only once.

After you have verified your account and created a Paramount+ username and password, you can sign in using the log-in credentials you just created (not your Apple ID) on paramountplus.com or the Paramount+ app.

https://help.paramountplus.com/s/article/PD-I-m-an-Apple-TV-channels-customer-Can-I-stream-Paramount-via-the-Apple-TV-app#ATVP