$login_url = "https://gss.ridika.com/player/1.26/player/login";
$curl = curl_init();
curl_setopt_array( $curl, array(
    CURLOPT_URL => $login_url,
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_ENCODING => "",
    CURLOPT_MAXREDIRS => 10,
    CURLOPT_TIMEOUT => 5,
    CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
    CURLOPT_CUSTOMREQUEST => "POST",
    CURLOPT_HTTPHEADER => array(
        "content-type" => "application/json",
        "cache-control" => "no-cache"
    ),
    CURLOPT_POSTFIELDS => array(
        "username" => $simulation_account->username,
        "password" => $simulation_account->password,
        "language" => "en",
        "brand_id" => "1",
        "password_indicator" => "true"
    )
) );
$response = curl_exec( $curl );