With that in mind, just to warn everyone, this is very alpha-level software. It only supports postgres and redis right now. If you put the wrong credentials in, there's no feedback, it just seems like nothing happened. Also, trying to resize the window turned everything white for me and the app had to be rebooted.
If you decide to use it (and please do, because I want this to work), be sure to have your Mac's system log opened in console, so you can see what's going on.
UPDATE: Looks like someone has already submitted a pull request for the "no feedback on wrong credentials" bug I mentioned [1], and I created a ticket for the resize issue [2].