Function `access_token` returns bad request

[ivansenic]

Seems that you are setting the wrong content type, at least it does not match the official documentation which requires application/json:

vimeo.js/lib/vimeo.js

Lines 333 to 346 in ef0771e

	Vimeo.prototype.accessToken = function (code, redirectUri, fn) {
	const options = {
	method: 'POST',
	hostname: module.exports.request_defaults.hostname,
	path: authEndpoints.accessToken,
	query: {
	grant_type: 'authorization_code',
	code,
	redirect_uri: redirectUri
	},
	headers: {
	'Content-Type': 'application/x-www-form-urlencoded'
	}
	}

The function responses with in such case is:

<!doctype html>
<html lang="en">
   <head>
      <title>HTTP Status 400 – Bad Request</title>
      <style type="text/css">body {font-family:Tahoma,Arial,sans-serif;} h1, h2, h3, b {color:white;background-color:#525D76;} h1 {font-size:22px;} h2 {font-size:16px;} h3 {font-size:14px;} p {font-size:12px;} a {color:black;} .line {height:1px;background-color:#525D76;border:none;}</style>
   </head>
   <body>
      <h1>HTTP Status 400 – Bad Request</h1>
   </body>
</html>