How to use std.net.curl with specific curl query?

[tastyminerals]

I have a specific curl query that I want to use in a D script via 
std.net.curl.

Here is the query:

     curl -v -X POST
         --data-urlencode "username=user at gmail.net"
         --data-urlencode "password=12345"
         -H "Content-Type: application/x-www-form-urlencoded"
         -H "Accept: application/json"
         -u "client_name:CLIENT_PASS"
         "https://some.i.net/oauth/token?grant_type=password"

The std.net.curl post documentation says that it needs a URL and 
a key:value map as arguments. However, what should be the key and 
what should be the value given the above query? There are two 
"--data-urlencode" parameters so the map cannot have two 
identical keys. Unfortunately the documentation is lacking both 
information and examples. Can somebody help me out here please?

In addition, the current "post" ddoc example fails to run 
throwing "std.net.curl.CurlException at std/net/curl.d(4402): 
Couldn't resolve host name on handle 55DF372ABBC0"