--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 /  __/ |  |__   _| |
        | .__/|_|  \___| .__/ \___/ \___/  | |  \_/ \___|_|     |_| | |
        |_|            |_|                  \_\                    /_/