I am using 3.1.4. My spring cloud config server has a self signed cert. I did not want to add its certificate to java trust store, so I wanted to use TlsProperties to provide the trust store. I can't do that without providing the keystore.

Currently the trust store is optional, I think the keystore needs to be optional too, as not always we need to use ssl client verification.

I can made a PR with the change, but I am not sure if removing this requirement in a straightforward way is OK for you.