Call slack-wordpress from other plugins

[IronOrange]

Like most WP users I have tons of plugins. I'm using this WP for a Destiny clan with approximately 250-300 members. Our tech-faction needs notifications from the website and most of the default ones included in your plugin suffice. I have a question though. I use the backup-to-dropbox plugin, and I'd like to know when a backup is completed or when a restore is completed and by the username doing it. Is it possible? Can you give me a hint on how to do that? I understand I'll have to edit the plugin and add code somewhere but I'm not even certain if this is possible with the slack-wordpress plugin's current capabilities. Thank you.