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I've been trying to make a Lyrebird application work. Mind that I only have basic javascript/php knowledge and have never done this so I tried implementing a cURL request noted on: "http://docs.lyrebird.ai". Needlessly to say that it doesn't work in javascript as well as PHP (even though I looked up on how to do it?)

I only need to run this example (the details are fake):

# Request #

curl -H 'Content-Type: application/json'
'https://avatar.lyrebird.ai/api/v0/token' -d
'
 "grant_type": "authorization_code",
 "client_id": "19qV2jZy1G44ifOxk6kgowAt9F0",
 "client_secret": "19qnfRvIXdmQKhSbLG0CLxng5Mz",
 "code": "19qozJe3hwnPvfl5xyNuR3MJ1NK"
'

# expected Response #

 "access_token": "18QdNlaDvkzMbgQ5SXmKNGmexWo"

How do I run the request (programming language?) in a way I get the "Expected Response" noted in the example?

curl is a tool to transfer data from or to a server, using one of the supported protocols (DICT, FILE, FTP, FTPS, GOPHER, HTTP, HTTPS,
IMAP, IMAPS, LDAP, LDAPS, POP3, POP3S, RTMP, RTSP, SCP, SFTP, SMB,
SMBS, SMTP, SMTPS, TELNET and TFTP). The command is designed to work
without user interaction.
-- https://curl.haxx.se/docs/manpage.html

If I understood your question, what you´re trying to achieve is transform curl into your favorite (PHP) language?

There are many different ways to do this but here are my 2 favorites:

Postman

Postman allows you to import curl commands for later manipulation and also once your command has been imported you can actually generate code snippets from a large list of supported languages including PHP.

Curl-to-PHP

This website has a copy-paste transformation approach.

curl is a linux-command to execute an http request to an url from command line. The tutorial, from which you posted the code, is just an example which creates a http-post request to the url.

You should check the API of your programming lanuage (PHP or node.js) for how to do a http-post request. Here is a question for how to make an http post from node.js: How to make an HTTP POST request in node.js?

In js you can use e.g. fetch:

var data=
 grant_type: "authorization_code",
 client_id: "19qV2jZy1G44ifOxk6kgowAt9F0",
 client_secret: "19qnfRvIXdmQKhSbLG0CLxng5Mz",
 code: "19qozJe3hwnPvfl5xyNuR3MJ1NK"

fetch('https://avatar.lyrebird.ai/api/v0/token', 
 method: 'POST',
 headers: "Content-Type": "application/json" ,
 credentials: 'include',
 body: JSON.stringify(data)
).then(function(res) 
 return res.json();
 ).then(function(res)
 console.log(res);
 ).catch((e)=>alert (e))