https://www.exfabrica.io/en/blog/how-to-securely-send-emails-via-gmail-using-oauth2-in-csharp-dotnet-a-step-by-step-guide.html
https://stackoverflow.com/questions/73464501/sending-email-with-oauth2-and-smtp-gmail-c
https://github.com/SmartQPtyLtd/GmailOAuth
https://learn.microsoft.com/es-es/power-platform/admin/connect-gmail-oauth2?tabs=new
https://developers.google.com/identity/protocols/oauth2?hl=es-419