parser.add_option('-e', '--email', dest='email', default="", help="email (mandatory for users)")
parser.add_option('-n', '--name', dest='name', default="", help="name (optional for authorities)")
parser.add_option('-k', '--key', dest='key', metavar='<key>', help='public key string or file',
parser.add_option('-e', '--email', dest='email', default="", help="email (mandatory for users)")
parser.add_option('-n', '--name', dest='name', default="", help="name (optional for authorities)")
parser.add_option('-k', '--key', dest='key', metavar='<key>', help='public key string or file',