Fetching error incident from AppSignal using GraphQL

IncidentQuery.gql

query IncidentQuery($appId: String!, $incidentNumber: Int!, $sampleId: String, $timestamp: String, $timerange: [DateTime]) {
  app(id: $appId) {
    id
    incident(incidentNumber: $incidentNumber) {
      ... on ExceptionIncident {
        ...ExceptionIncident
        __typename
      }
      __typename
    }
    __typename
  }
}
fragment ExceptionIncident on ExceptionIncident {
  id
  number
  lastOccurredAt
  actionNames
  exceptionName
  notificationFrequency
  state
  namespace
  firstBacktraceLine
  errorGroupingStrategy
  sample(id: $sampleId, timestamp: $timestamp, timerange: $timerange) {
    ...ExceptionSample
    __typename
  }
  __typename
}
fragment ExceptionSample on ExceptionSample {
  id
  appId
  time
  revision
  action
  namespace
  queueDuration
  originallyRequested
  overview {
    key
    value
    __typename
  }
  params
  sessionData
  customData
  environment {
    key
    value
    __typename
  }
  exception {
    name
    message
    backtrace {
      original
      line
      column
      path
      method
      url
      type
      code {
        line
        source
        __typename
      }
      error {
        class
        message
        __typename
      }
      __typename
    }
    __typename
  }
  firstMarker {
    id
    createdAt
    shortRevision
    revision
    gitCompareUrl
    user
    __typename
  }
  breadcrumbs {
    time
    category
    action
    message
    metadata {
      key
      value
      __typename
    }
    __typename
  }
  __typename
}

query variables

{
  "appId": "YOUR-APP-ID",
  "incidentNumber": ID-OF-INCIDENT,
  "sampleId": "SAMPLE-ID-STRING"
}