Expert in analyzing SSH, extend license for continuous use

I have an application that check login using SSH. It has windows and macOS versions and using chromium for browsing inside the app. The developers abandoned the app and don't support it anymore. Our credentials are expired but we want to keep using it. We need help from expert in this area. Please bid if you are comfortable with this kind of stuff. I can give you some successful login credentials and proxy for that.
Cheers