How to Add a Team member as a User

I get this popup but  how do I actually ADD A USER (who works on my team, not external). aarp membership benefits

To add a user who works on your team (not external), follow these steps:

1. Open Settings: Click the Start button and select the settings gear.
2. Navigate to Accounts: Go to Settings > Accounts and then select Family & other users.
3. Add User: Next to Add other user, select Add account.
4. Create Local User: Choose I don’t have this person’s sign-in information, and on the next page, select Add a user without a Microsoft account.
5. Enter Details: Enter a user name, password, or password hint, or choose security questions, and then select Next.