Sending Post Data in authentication requests

Hi,

I've got my authentication server set up, but it really likes to deal with POST requests. I've figured out a hack to get around it, but it would be great if I could send post requests.

I understand that if I want to send posts I just need to use
AuthValues.SetAuthPostData(...);
Unfortunately, I have no idea what that will do in terms of formatting.

First, I need to set the format of the post request to x-www-form-urlencoded
Then I need to add some key value pairs.

Any suggestions about how to do this? I have no idea what this text should look like and couldn't find any documentation.

Thanks,

Steve