The following is a snippet of pmm-admin on version 2.10.0.
pmm-admin config --server-insecure-tls --server-url=https://XXXXX:ZZZZZZ@PMMSERVERHOST:443
Checking local pmm-agent status…
pmm-agent is running.
Registering pmm-agent on PMM Server…
Failed to register pmm-agent on PMM Server: .