Help me !

[admin]

url must start with http://, also run your request like this so you can see full server response in Logs tab:

Code:

http = require('socket.http')
log(http.request {
  url = "api.speedsms.vn/index.php/user/info",
  headers = { authentication = "Basic " .. (mime.b64("kuDkYXtIBidDjCRmN8z_Yt9U12Dbs8TZ:x")) }
})