ObtainToken.scala

private def obtainTokenBasedOnIdentity(impersonatedUserCookies: Seq[(String, String)]): Future[(String, Duration)] = {
  val authUri = uri"${config.authServerUrl}/realms/${config.realm}/protocol/openid-connect/auth"
  sttp
    .get(uri"$authUri?response_mode=fragment&response_type=token&client_id=${config.clientId}&redirect_uri=${config.redirectUri}")
    .cookies(impersonatedUserCookies: _*)
    .followRedirects(false) // The response comes in the form of redirect
    .send()
    .map(extractTokenAndExpiration)
    .flatMap {
      case Some(tokenAndDuration) => Future.successful(tokenAndDuration)
      case None => Future.failed(new RuntimeException("Failed to extract token and duration from response headers"))
    }
}