title: MS Graph get report failed
body: <p>I try to get report like this</p>
  <pre><code>var report = await ServiceClient.Reports.GetMailboxUsageStorage(&quot;D7&quot;).Request().GetAsync();
  </code></pre>
  <p>But it fails with <br/>
  Newtonsoft.Json.JsonReaderException: Unexpected character encountered while parsing value: R. Path '', line 0, position 0.
  at Newtonsoft.Json.JsonTextReader.ParseValue()
  at Newtonsoft.Json.JsonReader.ReadForType(JsonContract contract, Boolean hasConverter)
  at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.Deserialize(JsonReader reader, Type objectType, Boolean checkAdditionalContent)
  at Newtonsoft.Json.JsonSerializer.DeserializeInternal(JsonReader reader, Type objectType)
  at Newtonsoft.Json.JsonSerializer.Deserialize(JsonReader reader, Type objectType)
  at Newtonsoft.Json.JsonConvert.DeserializeObject(String value, Type type, JsonSerializerSettings settings)
  at Newtonsoft.Json.JsonConvert.DeserializeObject[T](String value, JsonSerializerSettings settings)
  at Microsoft.Graph.Serializer.DeserializeObject[T](String inputString)
  at Microsoft.Graph.ResponseHandler.HandleResponse[T](HttpResponseMessage response)
  at Microsoft.Graph.BaseRequest.SendAsync[T](Object serializableObject, CancellationToken cancellationToken, HttpCompletionOption completionOption)</p>
  <p>What's wrong? Do you have any ideas?</p>