Posting Oauth token to log into application

I have code that gets the Oauth token so that I can log into an application.  However, the final part - going to the application - has me stumped.

I have tried a form:

<cfform name="trythis"" id="trythis" method="post" action="http://xxxx/api/v1/users/login.json?token=#gettokennumber#">

<input type="hidden" name="email" value="user@example.com">

<input type="hidden" name="password" value="pass123">

<input type="hidden" name="username" value="user1">

</cfform>

I am thinking that somewhere I have to use that it uses json...but I'm not sure where

Then I tried cfhttp     But it just sat there, doing nothing...

<cfhttp url="xxxx/api/v1/users/login.json?token=#gettokennumber#" method="post" >

    <cfhttpparam type="header" name="Content-Type" value="application/json" />

    <cfhttpparam name="password" type="formfield" value="pass123">

    <cfhttpparam name="email" type="formfield" value="user@example.com">

</cfhttp>

What am I doing wrong?