[mirotalksfu] - add log

app/src/Mattermost.js

@@ -61,6 +61,7 @@ class Mattermost {
 
             const { token, text, command, channel_id } = req.body;
             if (token !== this.token) {
+                log.error('Invalid token attempt', { token });
                 return res.status(403).send('Invalid token');
             }