Small fix

include/front-controller.php

@@ -130,18 +130,18 @@ Flight::route('POST /auth/oauth2/check_token', function() {
     $headers = apache_request_headers();
 
     if (!isset($headers['Authorization'])) {
-        throw new BadRequestException("Missing Authorization header");
+        throw new \RAP\BadRequestException("Missing Authorization header");
     }
 
     $authorizationHeader = explode(" ", $headers['Authorization']);
     if ($authorizationHeader[0] === "Bearer") {
         $token = $authorizationHeader[1];
     } else {
-        throw new BadRequestException("Invalid token type");
+        throw new \RAP\BadRequestException("Invalid token type");
     }
 
     if ($token === null) {
-        throw new BadRequestException("Access token is required");
+        throw new \RAP\BadRequestException("Access token is required");
     }
 
     $requestHandler = new \RAP\OAuth2RequestHandler($locator);