Automatically login when click on IdentityManager User Administration?

[manjits1991]

When i open the admin panel by click on "IdentityManager User Administration" link or open the admin section its not asking for any credentials or anything and automatically login in the admin panel.How can i add a custom login page on before of this panel and only the user with admin role can open this panel?
And how can i customize the pages shown in this admin panel,like i want to add another links in the nav-bar for manage scopes and clients and customize the other pages too?