parser = subparsers.add_parser('authors', help='Search authors')
parser.add_argument('-s', '--surname', help='search by surname')
parser.add_argument('-n', '--name', help='search by name')
parser = subparsers.add_parser('authors', help='Search authors')
parser.add_argument('-s', '--surname', help='search by surname')
parser.add_argument('-n', '--name', help='search by name')