Go into the Project Settings and within the Input, set it up so you can use one of the Analog sticks as well as the mouse cursor. They should be listed as something like gamepad joystick x or something like that. Obviously you will need to setup the axis within blueprint but this would most probs be similar to how the default controls are setup with a character. I would supply a picture but I am not on my own computer at the moment. Let me know how you get on.