How to call the API with token - rest

Question

I'm using https://github.com/Zizaco/entrust for my ReST API integration in Laravel 5.2
I can retrieve the token. Then, I try to pass it to some route which needs the token. But I get this error with status code 401:
Failed to authenticate because of bad credentials or an invalid authorization header.
This is the code I use:
$base_url = 'http://mysite/api/';
$fields = array(
'email' => urlencode('myEmail'),
'password' => urlencode('myPass'),
);
$fields_string = '';
foreach($fields as $key=>$value) { $fields_string .= $key.'='.$value.'&'; }
rtrim($fields_string, '&');
$ch = curl_init();
curl_setopt($ch,CURLOPT_URL, $base_url . 'login');
curl_setopt($ch,CURLOPT_RETURNTRANSFER,true);
curl_setopt($ch,CURLOPT_POST, count($fields));
curl_setopt($ch,CURLOPT_POSTFIELDS, $fields_string);
$result = curl_exec($ch);
$result = json_decode($result, true);
$token = false;
if ($result['result'] == 'success') {
$token = $result['token'];
}
if ($token) { //call the api by passing the token:
// var_dump($token);
curl_setopt($ch,CURLOPT_URL, $base_url . 'admin/sells');
curl_setopt($ch,CURLOPT_RETURNTRANSFER,true);
curl_setopt($ch, CURLOPT_HTTPHEADER, [
'Content-Type: application/json',
'Authorization: Bearer ' . $token
]);
curl_setopt($ch,CURLOPT_POST, null);
curl_setopt($ch,CURLOPT_POSTFIELDS, null);
curl_setopt($ch, CURLOPT_HTTPGET, 1);
// var_dump(curl_getinfo($ch));
$result = curl_exec($ch);
$result = json_decode($result, true);
var_dump($result);
}
And this is my route:
$api = app('Dingo\Api\Routing\Router');
$app_controller = 'App\\Http\\Controllers\\';
$auth_controller = 'App\\Http\\Controllers\\Auth\\';
$api->version('v1', function ($api) use ($app_controller,$auth_controller) {
$api->post('login', ['as' => 'api_login', 'uses' => $auth_controller . 'AuthController#authenticate']);
});
$api->version('v1', ['middleware' => 'api.auth'], function ($api) use ($app_controller,$auth_controller) {
$api->get('admin/sells', ['as' => 'api_admin_sells', 'uses' => $app_controller . 'SellsController#apiIndex']);
});
Am I doing anything wrong?