parser=argparse.ArgumentParser(description='Edit the user designed by the user_id. If no file is provided, returns a json listing all the fields used to describe a user.')
parser.add_argument("-i","--user_id",required=True,help="The name of the json file describing the user you want to modify.")
parser.add_argument("-f","--json_file",help="The name of the json file describing your modifications.")