How to customize the admin-ui login page

[kousherAlam]

Hello guys, i want to customize the admin ui login page, i will use angular to do so, but can't find any way to tap into replacing admin ui routes.

One way i'm thinking about replacing admin-ui login component with my own one.

Is there any straight forward solutions ?

Also i have two more question:

1. can i change that extensions route prefix for the extensions admin ui routes ?
2. can i add route outside of AuthGuard ?