def METHOD_NAME(self, file_name="4user.csv", resolver_name=None):
    # ------------------------------------------------------------------ --
    if not resolver_name:
        resolver_name = file_name.strip(".csv")
    # open the csv data and import the users
    user_file = os.path.join(self.fixture_path, file_name)
    with io.open(user_file, "r", encoding="utf-8") as f:
        content = f.read()
    upload_files = [("file", "user_list", content)]
    params = {
        "resolver": resolver_name,
        "dryrun": False,
        "format": "csv",
    }
    response = self.make_tools_request(
        action="import_users", params=params, upload_files=upload_files
    )
    assert response.json["result"]["status"]
    return response