Attempt to redeem a one time code registred on the client.

def _try_redeem_disposable_app(file, client):
    """
    Attempt to redeem a one time code registred on the client.
    """
    redeemedClient = client.redeem_onetime_code(None)
    if redeemedClient is None:
        return None
    else:
        return _BlotreDisposableApp(file,
            redeemedClient.client,
            creds = redeemedClient.creds,
            config = redeemedClient.config)