I hope to add the ability to save login credentials

Just like JuiceSSH, you can save each set of account and password or account and key, and you can select it through the drop-down box when creating or modifying a session, which will be very convenient

Thanks to the author for developing such a useful tool!

No files, tests, or entry points are mentioned. Start by locating the session-creation and session-modification flows, then trace how account/password and account/key credentials are handled; done means saved credential sets can be selected from a drop-down in both flows.

Written by the indexing model from the issue text.