add success and failure Notifications

when user tries to login without verifying account application should show "verify your email" notification, based on text coming from api!
In the same way when user performs any task on registration or login form if it is successful app should show success notification!

Start by locating the registration and login form handlers and the code that processes API responses. Verify how account-verification failures and successful registration or login are represented, then ensure the specified notifications appear for those outcomes; done means both success and unverified-account cases are visibly reported.

Written by the indexing model from the issue text.