from gw2.api import Account, Character, Recipes

async with Account() as client:
    # Authenticates *this instance* for this endpoint
    client.auth("ABCDE-...")
    data = await client.get()

    print(data.commander)  # True
    print(data.last_modified)  # a datetime instance

async with Account() as client:
    # Authenticate for this instance and all following instances
    client.global_auth("ABCDE-...")
    data = await client.get()

    print(data.last_modified)  # still a datetime instance

async with Character("Some Character") as client:
    # Retrieve data with previously set API key
    data = await client.get()

    print(data.profession)  # "Elementalist"
async for recipe in Recipes().many(ids=[1,2,3,4]):
    # Retrieve recipes as async iterator
    print(recipe)

# ...