title: Strapi - How to custom graphql with Strapi
body: <p>Ex:
  <a href="http://localhost:1337/graphql?query=" rel="nofollow noreferrer">http://localhost:1337/graphql?query=</a>{users(id:1){id}}
  expect:</p>
  
  <pre><code>{
    "data": {
      "users": [
        {
          "id": "1"
        }
      ]
    }
  }
  </code></pre>
  
  <p>actual:</p>
  
  <pre><code>{
    "errors": [
      {
        "message": "Unknown argument \"id\" on field \"users\" of type \"Schema\".",
        "locations": [
          {
            "line": 1,
            "column": 8
          }
        ]
      }
    ]
  }
  </code></pre>