我正在尝试获取访问令牌没有我收到此错误

{“error_description”：“授权服务器不支持授权授权类型”,“error”：“unsupported_grant_type”}

$code =  $_GET['code'];

$postfields = array(
    'grant_type'=>'authorization_code',
    'code'=>$code,
    'redirect_uri='=>'example/myTest.php',
    'client_id'=>'amzn1.application-oa2-client.xxxxxxxxxxx',
    'client_secret'=>'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx'
    );
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, 'https://api.amazon.com/auth/o2/token');
curl_setopt($ch, CURLOPT_HTTPHEADER, ['Content-Type: application/x-www-form-urlencoded']);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($httpRequest, CURLOPT_HEADER, 1);
// Edit: prior variable $postFields should be $postfields;
curl_setopt($ch, CURLOPT_POSTFIELDS, $postfields);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0); // On dev server only!
$result = curl_exec($ch);

print_r($result);

解决方法:

尝试添加’token_type’=>你的$postfields数据的’bearer’.

这是来自亚马逊的开发者文档：
“访问令牌请求…返回的令牌类型.应该是持票人.”

“访问令牌响应：… unsupported_grant_type客户端指定了错误的token_type.”