New speaker mutation - [Post] GraphQL with Sinatra (Ruby) - Part 2- Mutations

mutation.graphql

mutation AddSpeaker($name:String, $talkTitle:String, $bio:String, $twitterHandle:String) {
  createSpeaker(name: $name, talkTitle: $talkTitle, bio: $bio, twitterHandle: $twitterHandle) {
    success
    errors
  }
}

variables.json

{
  "name": "Adam Smith",
  "talkTitle": "Web Development Fundamentals",
  "twitterHandle": "adamsm",
  "bio": "Adam is a seasoned web developer, who has worked as a Software Engineer in Google, and now is the force behind the GraphiQL web client"
}