Wrapped getallheaders() method in function_exists (function isn't available on command line)

src/Oauth2/Resource/Server.php

@@ -127,6 +127,7 @@ class Server
         }
 
         // Try and get an access token from the auth header
+        if (function_exists('getallheaders')) {
             $headers = getallheaders();
             if (isset($headers['Authorization'])) {
 
@@ -136,6 +137,7 @@ class Server
                     $accessToken = base64_decode($rawToken);
                 }
             }
+        }
         
         if ($accessToken) {