Auto login when loading kibana iframe.

Hi, I embed the iframe in an external web page. When login to the external page, user has to authenticate. Besides, user load the dashboard has to authenticate kibana again.

I want to merge the two system authentication. How can I do?

ES:6.2.2 Kibana:6.2.2 SG:6.2.2
Version: enterprise module.

no other plugin install.

thank you in advance!

using proxy authentication with an external login could help, if you have an SSO in your organisation