Where does Chrome store login credentials in macOS?

Lets assume you are not confusing Google and Chrome.

Google application passwords are stored in your KeyChain, for things like Gmail, Calendar, Google drive ect..

Chrome passwords are stored on your HD at

~/Library/Application Support/Google/Chrome/Default/databases in special format. (SQL)

However Chrome is a browser and its passwords for diverse websites is not stored in the KeyChain.

All of your Chrome passwords are encrypted by Chrome and stored in an SQLite database file under Chrome's Local App Data. It is not stored via Keychain.

If you would like to know more about the technical details, refer this answer.