This blog might help you.
Caution: iLogix Computer Solutions are not responsible for loss of data. If you are not confident then stop. Be sure you backup your Mac. Please read our Blog post on protecting your memories.
Keychain Access is a macOS app that stores your passwords and account information, and reduces the number of passwords you have to remember and manage.
When you access a website, email account, network server or other password-protected item, you may be given the option to remember or save the password. If you choose to save the password, it’s saved in your keychain so you don’t have to remember or type your password every time. Check out this Apple article for more information on Keychain Access.
There will be rare occasions when Keychains go wrong.
Apple used to have a Keychain First Aid tool in keychain access. This is now deprecated.
If you are having problems with your Keychain you have the options to reset it.
Keychains can be reset, this will result in the loss of your secrets.
Like everything in macOS keychain Access leaves logs behind and you can read these in realtime using the following command in the macOS Terminal.
log stream --predicate 'subsystem == "com.apple.securityd" AND message CONTAINS[cd] "Keychain Access"' --info --debug --signpost --style compact
The following will allow you to target a point in time.
log show --start "2019-08-11 14:21:45" --end "2019-08-11 14:22:00" --predicate 'subsystem == "com.apple.securityd" AND message CONTAINS[cd] "Keychain Access"' --info --debug --signpost --style compact
Seeing in realtime what is happening may give you the insight needed to make changes that could fix the issue without having to purge out your Keychains.