how does two factor authentication work?
2FA is like having two locks on a door. The first lock is a regular lock that you open with a key. The second lock is a special lock that requires a secret code to open.

When you want to open the door with 2FA, you first use the key to unlock the regular lock. But then, instead of being able to go through the door right away, you have to enter the secret code into the special lock. The code might be a number that you remember or a code that you get from an app on your phone.

The idea behind 2FA is to make it harder for someone to get into a place or access information, even if they have the key or password. By requiring a second factor (like the secret code), it adds an extra layer of security to protect against unauthorized access.
Can you give some pros and cons of the different two factor authentication methods?
Here are some pros and cons for common two-factor authentication methods:

SMS Text Message:
Pros: It's easy to set up and uses something people already have (a phone number).
Cons: SMS messages can potentially be intercepted, and it's not ideal for those without consistent cell service.

Authentication App:
Pros: It's more secure than SMS and apps like Google Authenticator are free and easy to use.
Cons: It requires installing an extra app and initial configuration is needed.

Security Key:
Pros: It's very secure since physical keys are difficult to phish or replicate.
Cons: Physical keys can potentially be lost, damaged, or stolen, and they cost extra money to purchase.

Overall, it depends on your specific needs and how much convenience vs security you want. SMS is the most convenient but least secure, an authentication app adds more security, and a physical security key is the most secure but least convenient method. Feel free to follow up if you would like me to elaborate on any of the points or discuss other two-factor authentication options. My goal is to provide helpful information so you can determine what will work best in your situation.
How can I implement two factor authentication in a web app that I created using an authentication app?