Signing into account multiple accounts

Sign into the account

Go to Settings > Account > Sign in Security and Passkey > Change My Sign in Preferences > Go all the way to the right and choose Customize > Save your password

because your signed in, and then sign into a different account it will sign you out of the first account, try using two separate browsers, this is what happens when you use multiple email accounts.

The sign in screen was misleading as it says sign in an adult account.
I realized this after creating multiple accounts

Thank you for your input

I have the greyed out avatar and have tried signing in multiple times with multiple accounts and it didn't work

He would need his own account. You can't sign in and play on multiple consoles with the same account.