SendGrid - It's like it does not send email to the customer - .net-core

Question

It's like I have contact Sendrid to hear about how I may not send email.
That's because I need a username and password to be able to do that.
Sendgrid say on Twitter (PM)
For sending mail through SMTP, you will want to set your host to http://smtp.sendgrid.net . You can then use port 587, 2525 or 25 for TLS connections, and can use either your SendGrid username/password for authentication, or an API key generated on your account.
Code:
var resultMail = await _viewRenderService.RenderToStringAsync("~/Views/Templates/NewPassword.cshtml", viewModel);
var api = Environment.GetEnvironmentVariable("azure_xxxxxxx#azure.com");
var client = new SendGridClient(api);
var from = new EmailAddress("hello#hello.com", "J. Petersen");
var to = new EmailAddress("test#test.com", "Test");
var plainTextContent = Regex.Replace(resultMail, "<[^>]*>", "");
var msg = MailHelper.CreateSingleEmail(from, to, title, plainTextContent: plainTextContent,
htmlContent: null);
var resulta = client.SendEmailAsync(msg);
I have looked at Documentation on Sendgrid, and I do not think I'll find that you need to use username and password and port.
It is built in .net core 2.0 - Problems are how can I add my username and password and port to this?

Answer 1

Your using the API not SMTP, Here is the standard smtp
var mailMessage = new MailMessage
{
From = new MailAddress("support#bla.net"),
Subject = "Hello World",
Body = "Test email from Send Grid SMTP Settings"
};
mailMessage.To.Add("someone#somehwere.net");
var smtpClient = new SmtpClient
{
Credentials = new NetworkCredential("Your-Username#azure.com", "Your-Password"),
Host = "smtp.sendgrid.net",
Port = 587
};
smtpClient.Send(mailMessage);