When interacting with the InfluxDB HTTP API a "connection" needs to be
provided. A connection is a hash-map describing how to connect to InfluxDB and
could look like the following:
  {:url "http://localhost:8086"
   :username "root"
   :password "root"}
Only the :url is mandatory.

For convenience a point can be represented by a hash-map:
   {:meas "cpu"
    :tags {:host "serverA" :region "us_west"}
    :fields {:value 0.64 :count 3}
    :time 1434067467000000000}

Just like for inserts and using the Line Protocol only measurement (meas) and
at least one field is mandatory:
https://docs.influxdata.com/influxdb/v1.7/write_protocols/line_protocol_reference/