using sharepoint user credentials in a flex application?

Question

I am deploying a flex application in sharepoint as a web part. I am planning to use sharepoint user credentials for my flex application. My flex application consists of various different user roles like author,reviewer etc. An author should be able to see all the list of sharepoint users available and can make any number of them as reviewer or author. For this I require following functionality through sharepoint for my flex application:-

1) Getting list of all users of sharepoint

2) Getting the username of the current logged in user of sharepoint through the flex application, which is deployed as a web part in sharepoint.

How to do this?

Answer 1

Did this by creating a custom asp.net web service and deploying it on sharepoint.Through this web service, I retrieved current user and the list of users using share point object model.Flex inquires this web service for current user and list of available users