How to make a post request to the api

[RebeccaH946]

Am trying to make a post request but am getting an error, anyone with an idea on what am not writing correct in my code snippet:

<?php
$request = new HttpRequest();
$request->setUrl('https://api.cc.email/v3/account/email');
$request->setMethod(HTTP_METH_POST);
$access_token = '7a8f8fca-8f2e-42de-9de7-b78c59c990de';

$request->setHeaders(array(
'Authorization' => 'Bearer {$access_oken}',
'Content-Type' => 'application/json'
));

$request->setBody('{
"email_address": "muytaba@yahoo.com"
}');

try {
$response = $request->send();

echo $response->getBody();
} catch (HttpException $ex) {
echo $ex;
}

[raleighb3]

...Authorization' => 'Bearer {$access_oken}'...