1. Why would you want to store usernames and passwords in the Web.Config file?

2. Create an ASP.NET page that uses a GridView to display the books from the Books table and a RadioButtonList of all the authors to allow the user to filter the books displayed. (Be sure to set the RadioButtonList's AutoPostBack property to True.) Make sure that the RadioButtonList displays only unique author names. In addition, because on the initial page load, the RadioButtonList will not have any item selected, you will need to set a default value for the parameter you create in the GridView's SqlDataSource Wizard. Set the default parameter value to a blank string. With this setting, when the page first loads, before a user selects an author from the list of radio buttons, the GridView should not be shown because there should be no authors with a blank string. Upon selecting a new author, the page will post back and the books that the selected author has written will be displayed.

please write the code and screenshot the output