I am getting the error “Missing Mashape application key” when I send the post request with Unirest PHP.

I always get an error response despite using the API keys provided;

Unirest\Response Object ( [code] => 401 [raw_body] => [body] => [headers] => Array ( [{“message”] => “Missing Mashape application key. Go to http://docs.mashape.com/api-keys to learn how to get your API application key.”} ) )

We used two API keys. We get the same error for both. First one is found when I go to the “Default Application” page, click on the “Get the Key” button located on the top right section of the screen.

The second one is found when I go to “https://market.mashape.com/OSoMe/botometer-pro” page and select the “Default Application” to Request Headers section. I then copy the Mashape API key on the right side of Request Example in the PHP section.

First My-Mashape-Key: us2J0mWtAbmsh0Muacm72IDLqmZJp1jNGKNjsniA0fjlQbERY9
Second My-Mashape-Key: o6eVPWP9rRmsh9GM4T7WKa4joboVp1bVOOajsnCv0aP0kcjjEm

My request code;

$response = Unirest\Request::post(“https://botometer-pro.p.mashape.com/2/check_account”,
array(
“X-Mashape-Key” => “My-Mashape-Key”,
“Content-Type” => “application/json”,
“Accept” => “application/json”
),
json_encode(array(“user” => array(“id” => “590030385”, “screen_name” => “murat_basci”),
“timeline” => $timeline,
“mentions” => $mentions->statuses))

);

Thanks in advance for all your help.