Open OBIEE report on click of button in Siebel

Hello there,

I'm trying to invoke OBIEE report from click of button in Siebel. I have the code (escript) written in Applet browser script which calls a business service that prepares the OBIEE url and passes back to Applet to open (window open) the url in the browser. It was all good in OBIEE 10g and with Siebel 8 version. Lately we upgraded  OBIEE to 12c and Siebel 8 to Open UI. Since the upgrade when I click the button it takes me to login page in obiee, We were just passing the user id, no password in the url.

I think OBIEE 12 enforces to have the password to login from Siebel, Now my question is how do I pass the password (encrypted) from Siebel to OBIEE in the url. I tried to get the password using the following code snippet in business service but with no luck, If passing the password in the url is not possible how do I skip the login page when I click the button. We have ldap (adsi) authentication in Siebel and OBIEE separately (no SSO integration between Siebel and OBIEE), but have obiee dashboard (IFrame) views in Siebel via  symbolic urls.