--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 /  __/ |  |__   _| |
         |_| |_|\__, |\__,_|\__, |_|\___/  | |  \_/ \___|_|     |_| | |
                |___/          |_|          \_\                    /_/