def METHOD_NAME(self) -> "Optional[HeadersType]":
    headers = Headers()
    headers['Access-Control-Allow-Origin'] = request.environ.get('HTTP_ORIGIN')
    headers['Access-Control-Allow-Headers'] = request.environ.get('HTTP_ACCESS_CONTROL_REQUEST_HEADERS')
    headers['Access-Control-Allow-Methods'] = '*'
    headers['Access-Control-Allow-Credentials'] = 'true'
    headers['Access-Control-Expose-Headers'] = 'X-Rucio-Auth-Token'
    return headers