--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 /  __/ |  |__   _| |
          |_| |_|\___/|_|/ |____/ \___/  | |  \_/ \___|_|     |_| | |
                       |__/               \_\                    /_/