is used by to access keys provided by a FIDO  authenticator.   is
     not  intended to be invoked by the user, but from A single option
     is supported: Verbose mode.  Causes to print  debugging  messages
     about  its  progress.   This  is  helpful  in debugging problems.
     Multiple options increase the verbosity.  The maximum is 3.  Note
     that  will automatically pass the flag to when it has itself been
     placed in debug mode.  first appeared in