Instagram登录错误：无效的客户端密钥

Question

If I am trying to login with Instagram using api,

Code :

$ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $apiHost);
    curl_setopt($ch, CURLOPT_POST, count($apiData));
    curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($apiData));
    curl_setopt($ch, CURLOPT_HTTPHEADER, array('Accept: application/json'));
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    $jsonData = curl_exec($ch);
    curl_close($ch);

Error :

{
error_type: "OAuthException",
code: 400,
error_message: "Invalid Client Secret"
} 

Does any one have idea?