API, POST

[tomnord]

So, I've run into a wall on something as ease as a POST function to a API.
How do I format the request to get this to work?

Code:

curl --request POST \
     --url https://api.easee.cloud/api/chargers/EH840488/settings \
     --header 'Authorization: Bearer *****MY TOKEN*****' \
     --header 'content-type: application/*+json' \
     --data '
{
     "dynamicChargerCurrent": 16
}
'

Code:

function WriteToEasee(request, request_body)
  request_url = 'https://api.easee.cloud/api/' .. request
  local response_body = {}
  local request_body = ""
  local body, code, hdrs, stat = ssl.https.request{
    url = request_url;
    method = "POST";
    headers =
    {
      ["Content-Type"] = "application/json";
      ["Authorization"] = "Bearer " .. API_Token;
    };
    source = ltn12.source.string(request_body);
    sink = ltn12.sink.table(response_body);
  }
  log(code)
  if code == 200 then
    ret = table.concat(response_body)
    ret = json.pdecode(ret)
    return ret
  else
    --API_Token = GetToken() -- request a new token
  end
end

dynCurr = 10
-- Dynamic current setting.
WriteToEasee('chargers/' .. ChargerID  .. '/settings', "dynamicChargerCurrent" .. dynCurr)

This is as far as I've gotten. I'm getting code 400, request is missing or has invalid values.
I guess it's a small matter, but i have not worked with POST functions before.