addStoryExpert
addStoryExpert adds an expert to a story.
addStoryExpert( input: AddStoryExpertInput!): AddStoryExpertPayload!
addStoryExpert adds an expert to a story.
addStoryExpert( input: AddStoryExpertInput!): AddStoryExpertPayload!
input (AddStoryExpertInput!)#AddStoryExpertPayload#