And after registering an active API key with credits.
$ runpodctl config --apiKey ..key..Configuration saved to file: $HOME/.runpod/config.tomlExisting local SSH key found.SSH key added successfully to the cloud.
$ runpodctl config --apiKey ..key..Configuration saved to file: $HOME/.runpod/config.tomlExisting local SSH key found.SSH key added successfully to the cloud.
Solution
I discovered that runpoctl interface is baseically deprecated or not full-featured