Lua - Request works via curl, but not via Lua (Lua socket)?

Question

I’m trying to interact with the Sipgate api (https://developer.sipgate.io/ ) using Lua, and an example they provide for authentication uses Curl, which works. (Not my b64 user/pass)

curl \
  --request GET \
  --header "Accept: application/json" \
  --header "Authorization: Basic Sm9objp0b3BzZWNyZXQ=" \
  https://api.sipgate.com/v2/account

But when I try it via Lua, I get the following error. Does anyone have an idea of what i’m missing

Message/response..

ok 1
statusCode 301
statusText HTTP/1.1 301 Moved Permanently
headers: table: 0x2692948
location https://api.sipgate.com:80/v2/account/
connection close
content-length 0

Lua code used..

local https = require "ssl.https"
local mime = require("mime")
local http = require "socket.http"
local data = ""
local username = "user"
local password = "pass"

local function collect(chunk)
  if chunk ~= nil then
    data = data .. chunk
    end
  return true
end

local ok, statusCode, headers, statusText = http.request {
  method = "GET",
  url = "https://api.sipgate.com/v2/account",
  headers = {
    ["Accept"] = "application/json",
    ["Authorization"] = "Basic " .. (mime.b64(username ..":" .. password)),
    },
  sink = collect
}

--debug - 
print("enc64", mime.b64(username ..":" .. password))
print("ok\t",         ok);
print("statusCode", statusCode)
print("statusText", statusText)
print("headers:", headers)

print("data", data)