Is cert within a string dict supported?

[dennispan]

In Argo CD, its cluster secret is in an Opaque secret, with the data in this format, if certificate is used as the auth:

config: '{"tlsClientConfig":{"insecure":false,"certData":".......RVJUSUZJ.......","keyData":"......QW9HQ0NxR1N......","caData":"......VXhNemt6TXpCWk......"}}'
name: cluster-name
server: https://cluster-ip

Is there a way to watch the expiration of the certData in this case?