updated intro

Signed-off-by: bidi <[email protected]>

Author: bidi47

docs/book/v5/introduction/introduction.md

@@ -4,4 +4,6 @@ Dotkernel Admin is an application (skeleton) intended for quickly setting up an
 It's a fast and reliable way to manage records in your database with a simple table-based approach, and also to build reports and graphs to monitor your platform.
 The many graphical components at your disposal ensure an intuitive user experience.
 
-Check out our [demo](https://v5.dotkernel.net/).
+> Check out our [demo](https://admin5.dotkernel.net/).
+> 
+> Submit user `admin` and password `dotadmin` to authenticate yourself.