This is the code I used. It should have called the URL “https://id.twitch.tv/oauth2/token”
local http = game:GetService("HttpService")
local client_id = "<your_client_id>" -- Replace <your_client_id> with your Twitch API client ID
local client_secret = "<your_client_secret>" -- Replace <your_client_secret> with your Twitch API client ID
local ClientAccountName = "<your_channel_name>"
-- Make an HTTP request to the Twitch API to get an access token
local url = "https://id.twitch.tv/oauth2/token"
local data = "client_id="..client_id.."&client_secret="..client_secret.."&grant_type=client_credentials"
local request = http:PostAsync(url,data,Enum.HttpContentType.ApplicationUrlEncoded,false)
local data = http:JSONDecode(request)
print(data.access_token)