Open a picture and duplicatie the layer
Convert the top layer to a Smart Object (Ctrl click on the layer)
Go to Filter > Lens Correction and click on Custom
You can see the vignette section in the middle of the screen. Drag the slider to the left to create a dark vignette. Drag it to the right to create a light vignette, but why should you do that.
Set the midpoint on a place that fits best with your photo.
Easy and quick
By double click on the lens correction in your layer panel you can change the amount.