If no data line graph value to zero

Hi, I’m lcc3108
My English is not good

I develop google analytics plugin.

When querying through the GA API, the data comes in the following format
(date range 2021-03-21 to 2021-03-21)

{
  "reports": [
    {
      "columnHeader": {
        "dimensions": ["ga:dateHour"],
        "metricHeader": {
          "metricHeaderEntries": [
            {
              "name": "ga:users",
              "type": "INTEGER"
            }
          ]
        }
      },
      "data": {
        "rows": [
          {
            "dimensions": ["2021032103"],
            "metrics": [
              {
                "values": ["1"]
              }
            ]
          },
          {
            "dimensions": ["2021032110"],
            "metrics": [
              {
                "values": ["1"]
              }
            ]
          }
        ],
        "totals": [
          {
            "values": ["2"]
          }
        ],
        "rowCount": 2,
      }
    }
  ]
}

plugin convert data to grafana dataframe

Chart

I want line graph to zero when there is no data


Grafana have this kind of function? or plugin add padding data frame

Thanks