Fail if Telegram API ID or API Hash empty

internal/telegram/telegram.go

@@ -14,6 +14,14 @@ import (
 // At first launch we need to login manually - there is no way to automate
 // Telegram login
 func Authenticate() {
+	if c.Config.TDLib.APIHash == "" {
+		log.Error().Msg("APIHash is empty")
+		return
+	}
+	if c.Config.TDLib.APIID == "" {
+		log.Error().Msg("APIID is empty")
+		return
+	}
 	tdlib.SetLogVerbosityLevel(1)
 	tdlib.SetFilePath(c.Config.TDLib.ErrorsFile)