Can't update gmail password in Mail 10.3
I am running Sierra on an iMac so that my Quickbooks software will run. I needed to update a password on a gmail account which was compromised. I updated the password in the Google website but I can't update it in the Mail app 10.3. Is there a solution so I can use the gmail account in Mail and not have to sign in to Google?
iMac 21.5″ 4K, macOS 10.12