title: How to filter SharePoint list items by Created by in Microsoft Graph?
body: <p>I'm trying to get a collection of list items from a SharePoint through Microsoft Graph, which I want to filter by CreatedBy.
  Requesting: <code>https://graph.microsoft.com/v1.0/sites/{siteid}/lists/TeamRequests/items</code></p>
  
  <p>Returns:</p>
  
  <pre><code>{
  "@odata.context": "https://graph.microsoft.com/v1.0/$metadata#sites('{url}')/lists('TeamRequests')/items",
  "value": [
      {
          "@odata.etag": "\"56ad787e-bd69-464a-b5da-dd953e40d7c4,13\"",
          "createdDateTime": "2018-02-26T08:34:26Z",
          "eTag": "\"56ad787e-bd69-464a-b5da-dd953e40d7c4,13\"",
          "id": "11",
          "lastModifiedDateTime": "2018-03-22T13:20:03Z",
          "webUrl": "{url}/Lists/TeamRequests/11_.000",
          "createdBy": {
              "user": {
                  "email": "{email}",
                  "id": "9c9cbb67-c049-4a2d-845d-6c5ca2300041",
                  "displayName": "{Name}"
              }
          },
          "lastModifiedBy": {
              "user": {
                  "email": "{email}",
                  "id": "9c9cbb67-c049-4a2d-845d-6c5ca2300041",
                  "displayName": "{Name}"
              }
          },
          "parentReference": {},
          "contentType": {
              "id": "0x01005F15F8133495554D834FF82F187AD0630002133A9CCDE4494D8CB2206D7D6453D6"
          }
      },
  </code></pre>
  
  <p>Now I'd like to filter this request for createdBy, either Id, displayName or email address. I tried <code>?$filter=createdBy/user/email eq '{email}'</code> and similar requests for id or displayName. They all return</p>
  
  <pre><code>{
      "error": {
          "code": "generalException",
          "message": "An unspecified error has occurred.",
          "innerError": {
              "request-id": "492e3bde-05fe-4484-a475-435ff0aa70b6",
              "date": "2018-07-23T07:41:46"
          }
      }
  }
  </code></pre>
  
  <p>So how to accomplish this filter? Is it even supported?</p>