cloud influxQLQueryApi.query() returned data plus error message

[dopsieee]

Proposal:
Hi，I found two functional optimization suggestions。（ps: translated this by tools, i'm not sure if it is correct. XD)

1. When using the "influxQLQueryApi.query()" , the returned data does not contain error message, and no exception was throwed.
   When I used influxQL to query the data. I used the "avg()" function incorrectly (it should be "mean()"), which caused me to fail to get the data correctly, but the query api kept returning empty data. I thought there was no data at that time.
2. InfluxQLQuery's default acceptHeader is csv, which is much less informative than json format.

Current behavior:
when using "influxQLQueryApi.query()", there is no error message in the returned data
this influxdb api "/query" 's returned data like this:

{
  "results": [
    {
      "statement_id": 0,
      "error": "undefined function ..."
    }
  ]
}

Desired behavior:
when using "influxQLQueryApi.query()", the returned data have error message.

Alternatives considered:
throw exception with error message

Use case:
maybe when influxQL goes wrong, the program knows what went wrong

thanks.