code: def key(**kwargs):
    ''' Display system key. '''
   
    output, err = cli_syncthing_adapter.key(device=True)
    click.echo("%s" % output, err=errf key(**kwargs):
    ''' Display system key. '''
   
    output, err = cli_syncthing_adapter.key(device=True)
    click.echo("%s" % output, err=err)
docs: Display system key.