Picture Of The Inside Of A Vigina>picture How Do You Add A Picture Inside The Credits On Widows Movie Maker?

How do you add a picture inside the credits on widows movie maker? - picture of the inside of a vigina>picture

I try to do a school project and I have a picture of some people in the credits, but does not let me share it. How do I get a picture in the credits, and not before or outside?