Solved bug or typo in oauth mastodon

src/action/oauth/mastodon.php

@@ -18,7 +18,7 @@ curl_setopt($ch, CURLOPT_POSTFIELDS, [
 	'code'				=> $code
 ]);
 curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
-$auth = curl_exec($ch);
+$output = curl_exec($ch);
 curl_close($ch);
 
 # get mastodon account info