Jitsi Login without being prompt ( Merging two projects)

Hello all,
I am new to jitsi, still figuring out how to work with it.
I already have an xmpp android client.
This client stores Credentials to login into server.
Using Jitsi-SDK I have created an activity for video conference, it works great but because server is using LDAP authentication, jitsi prompts for user password.

I want jitsi activity to take Credentials from shared preferences of xmpp android client automatically for logging in while joining/creating an video conference.
It is possible somehow, which codea I will have to change?
I also want to change display name, Can we do that too?

After searching a bit, i found “xmpp_password_override”. I don’t know if it will work in this case, how will it work?