title: How to add default values to input arguments in graphql
body: <p>I have this input type and I would like to add a default Value to one of the fields. I want to add 0 to the value field inside the ExampleInput.</p>
  
  <pre><code>type ExampleType {
    value: Int
    another: String
  }
  
  type Mutation {
    example(input: ExampleInput): ExampleType
  }
  
  input ExampleInput {
    value: Int
    another: String
  }
  </code></pre>
  
  <p>Any ideas?</p>