title: Response to Graphql API of Wiki.js is "Forbidden"
body: <p>I am using <a href="https://wiki.js.org/" rel="nofollow noreferrer">Wiki.js</a> as docker container and came to know that it does supports Graphql to respond to API request (for eg: getting wiki pages content). 
  When I try to query it for a page's title, I get a response message as "Forbidden". </p>
  
  <p>Request:</p>
  
  <pre><code>query{
    pages {
      single(id: 2 ){
        title
      }
    }
  }
  </code></pre>
  
  <p>Response: </p>
  
  <pre><code>{
    "errors": [
      {
        "message": "Forbidden",
        "locations": [
          {
            "line": 3,
            "column": 5
          }
        ],
        "path": [
          "pages",
          "single"
        ],
        "extensions": {
          "code": "INTERNAL_SERVER_ERROR",
          "exception": {
            "stacktrace": [
              "Error: Forbidden",
              "    at field.resolve (/wiki/server/graph/directives/auth.js:47:17)",
              "    at field.resolve (/wiki/node_modules/graphql-extensions/dist/index.js:133:26)",
              "    at resolveFieldValueOrError (/wiki/node_modules/graphql/execution/execute.js:467:18)",
              "    at resolveField (/wiki/node_modules/graphql/execution/execute.js:434:16)",
              "    at executeFields (/wiki/node_modules/graphql/execution/execute.js:275:18)",
              "    at collectAndExecuteSubfields (/wiki/node_modules/graphql/execution/execute.js:713:10)",
              "    at completeObjectValue (/wiki/node_modules/graphql/execution/execute.js:703:10)",
              "    at completeValue (/wiki/node_modules/graphql/execution/execute.js:591:12)",
              "    at /wiki/node_modules/graphql/execution/execute.js:492:16",
              "    at process._tickCallback (internal/process/next_tick.js:68:7)"
            ]
          }
        }
      }
    ],
    "data": {
      "pages": {
        "single": null
      }
    }
  } 
  </code></pre>
  
  <p>Could someone let me know what wrong I am doing to get page's title via Graphql APIs of wiki.js?</p>
  
  <p>Thanks for the Help.</p>