def METHOD_NAME(saas_url, endpoint):
    """
    Basic url join but purposefully isolated to add some unittests easily.
    When merging an url and an additional endpoint, python's urljoin method
    has so many little details. See:
    https://stackoverflow.com/questions/10893374/python-confusions-with-urljoin
    So, basically we need to make sure that the url ends with '/' and
    the endpoint does not start with '/'
    """
    saas_url = f"{saas_url}/"
    endpoint = endpoint.lstrip("/")
    return urljoin(saas_url, endpoint)