To add a username and password to your Chrome URL, follow these steps:
1. Open Google Chrome and type the URL you want to save a username and password for.
2. When prompted to enter your login credentials, type them in and click "Log In."
3. After successfully logging in, click the three-dot menu icon at the top-right corner of your screen and select "Settings."
4. Scroll down to the "Autofill" section and click "Passwords."
5. In the "Saved Passwords" section, find the website you just logged into and click the three-dot menu icon next to it.
6. Select "Edit" and enter your desired username and password.
7. Save the changes and exit the Settings tab.
From now on, every time you visit that website, Chrome will automatically fill in your saved username and password.