--list-secret-keys
-K
    List all keys from the secret keyrings, or just the ones given on the command line. A # after the letters sec means that the secret key is not usable (for example, if it was created via --export-secret-subkeys).

            _            _  ___   __      __               _  _ __  
           | | _____   _(_)/ _ \ / /_    / /_   _____ _ __| || |\ \ 
           | |/ _ \ \ / / | | | | '_ \  | |\ \ / / _ \ '__| || |_| |
           | |  __/\ V /| | |_| | (_) | | | \ V /  __/ |  |__   _| |
           |_|\___| \_/_/ |\___/ \___/  | |  \_/ \___|_|     |_| | |
                      |__/               \_\                    /_/