get access token in two steps

[mostafaabd]

Hello,
I am using WordPress and plugin OAuth 2.0 plugin for WordPress https://wp-oauth.com/
This plugin requires 2 steps to get access token you can read this https://wp-oauth.com/docs/general/grant-types/authorization-code/

First, Send client_id and response_type this response with code, i read documentation but i can't get access_token form this code

var jso = new jso.JSO({
	providerID: "taskbook",
	client_id: "SZgnn4zvPNl8WiQ3KFL7WRGGhf2PNDW4RZ5UVSR3",
	//client_secrett: "wy9EVNSYSKV9LQ2ebgwzeUpGZBc78gCjV3KtuczG",
	redirect_uri: "http://127.0.0.1/taskbook/index.html",
	response_type : "code",
	authorization: ROOTURL + "/oauth/authorize",
	token	: ROOTURL + "/oauth/token",
	debug: true,
});

Second, I use 'code' that comes from the first step and send it again and add these parameters to jso.getToken()
{
grant_type : "authorization_code"
code: code
}