Help with Tesla Powerwall API V3

[gjniewenhuijse]

Refresh token is what you use to get a new access and refresh token pair. Access token is used for API calls. It might have already expired so you need to generate a new token pair.
You will need a scheduled script to refresh the token periodically. See this for more info: https://tesla-api.timdorr.com/api-basics...cess-token

i changed the code a little bit, but always received a deny from the webservice

Code:

function GetToken()
  body = json.encode({
    grant_type = 'authorization_code',
    client_id = 'ownerapi',
    refresh_token = refreshToken,
    scope = 'openid email offline_access'
  })

  resp = {}

  res, code, headers = http.request({
    url = 'https://auth.tesla.com/oauth2/v3/token',
    method = 'POST',
    source = ltn12.source.string(body),
    sink = ltn12.sink.table(resp),
    headers = {
      ['Content-Type'] = 'application/json',
      ['Accept'] = 'application/json',
      ['Content-Length'] = #body
    }
  })
 
  log(res, code, headers)
end

As refreshToken i used the Refresh Token from the Auth for Tesla app.

When i hardcoded the Access Token in the code it works, but this code expires in 8 hours

Code:

function GetToken()
  return accessToken --from the Auth for Tesla app
end