def METHOD_NAME():
    """Return test account clients using available env var credentials.
    Returns
    -------
    list of :class:`~verta.Client`
    """
    credentials = [
        (constants.EMAIL, constants.DEV_KEY),
        (constants.EMAIL_2, constants.DEV_KEY_2),
        (constants.EMAIL_3, constants.DEV_KEY_3),
    ]
    clients = []
    for email, dev_key in credentials:
        if email and dev_key:
            clients.append(Client(constants.HOST, email=email, dev_key=dev_key))
    return clients