Using user supplied database login details to connect to the database.

Our company currently using a third party developed application that require login. The username and password are the database username and password. The application will connect to the database by using user supplied username, password and database name. It means our employees who use that application has a username and password in database, and we login to the application by using our database username and password. On the application login screen, user must enter the following details:
- Username
- Password
- Database name

The above application was developed and implemented by third party company before I was hired. So, I also don't know why they design like this.

I am developing a local intranet website that generate reports through BI server's ViewAction Content Generator ( http://infocenter.pentaho.com/help/i...iewaction.html ) . The website will only be accessible by using local network. I want only the users of the above mentioned application will be able to run the reports. On login screen, authorized employees enter their username (of course, database username), password, and database name. Once submitted, the website should pass these details to the BI server's ViewAction Content Generator, then the BI server will use these details to connect to the database to generate report.

Question: After our employees enter the login details (including database name), can BI server's ViewAction Content Generator get these details? Can BI server connect to the database by using these details? If yes, how to achieve that?