import challonge

async def foo()
    # Log in into Challonge with your CHALLONGE! API credentials (https://challonge.com/settings/developer).
    user = await challonge.get_user('your_challonge_username', 'your_api_key')

    # Retrieve your tournaments
    tournaments = await user.get_tournaments()

    # Tournaments, matches, and participants are all represented as Python classes
    for t in tournaments:
        print(t.id)  # 3272
        print(t.name)  # 'My Awesome Tournament'
        print(t.status)  # 'open'

    # Retrieve the participants for a given tournament.
    participants = await tournaments[0].get_participants()
    print(len(participants)) # 13