How to read tags from InfluxDB

Hi all,

I have an InfluxDB with a measurement called "connections" that keep all the info related to PostgreSQL connections.
The measurement (table) has the following fields:

• active
• idle
• idle-transaction
• total
• waiting

and the following tags in the Grafana dashboard will be used to filter the data:

• env
• instance
• dbname
• hostname

Now I use the influxdb1-client to query these info with the following code:

    client, err = client.NewHTTPClient(
	client.HTTPConfig{Addr: "http://localhost:8086",
		Username:           "myuser",
		Password:           "mypwd",
		InsecureSkipVerify: "false"})
if err != nil {
	return nil, err
}
q := client.Query{
	Command:  "select * from backends",
	Database: "myinfluxdb",
}
if response, err := client.Query(q); err == nil {
	if response.Error() != nil {
		return res, response.Error()
	}
	res = response.Results
} else {
	return res, err
}

This code works fine but my problem is that this code only retrieves fields. The field res[0].Series[0].Tags is empty.
How I should change the code to read also, for each row in the measurement, the relative tags?

Start with the Query call shown in the issue and inspect the returned Series and Tags fields using the repository's client behavior. No file or test is named, so first locate the response parsing and query examples. Done means documenting how tags are returned for the stated measurement and clarifying the expected response shape.