I think this Keyring is related to Chrome/Chromium browser.
I stop using both of them a while ago.
I hope other volunteers on this forum could help you.
It needs to be setup in the first place. In the past I have used the same password as login. Usually you normally get a first use window about setting up - I just cancel each time it appears. If it is still doing this then perhaps this might help?:
KDE Plasma has something similar in respect of KDE Wallet. This is somewhat easier to disable as all you have to do is go to System Settings | Account Details then Wallet Preferences Tab will be shown and uncheck 'Enable the KDE wallet subsystem'.