How do I implement two-factor authentication in ASP.NET Core Identity?

How do I implement two-factor authentication in ASP.NET Core Identity?

To implement two-factor authentication in ASP.NET Core Identity, you need to configure your application to use a two-factor provider, such as email or SMS.

What are the steps to set up SMS as a two-factor option?

First, you need to install the necessary NuGet packages for SMS services. Then, configure your Identity options to include SMS as a two-factor method.

Can you show me a code example for sending an SMS?

Sure! You can use a service like Twilio. Here's a simple example:

public async Task SendSmsAsync(string number, string message)
{
    var client = new TwilioRestClient(accountSid, authToken);
    await MessageResource.CreateAsync(
        to: new PhoneNumber(number),
        from: new PhoneNumber(twilioNumber),
        body: message);
}

What if I want to use email instead of SMS?

You can use the built-in email provider in ASP.NET Core Identity. Just configure the email sender service and set it as the two-factor method.