How can I handle errors in Go during authentication?

How can I handle errors in Go during authentication?

In Go, you can handle errors during authentication by checking the error returned from your authentication function. If an error occurs, you can log it and return an appropriate response to the user.

Can you give me an example of error handling in a login function?

Sure! Here's a simple example:

func Login(username, password string) error {
    user, err := findUser(username)
    if err != nil {
        return fmt.Errorf("user not found: %w", err)
    }
    if !checkPassword(user, password) {
        return fmt.Errorf("invalid password")
    }
    return nil
}

What should I do if the error is due to a database connection issue?

In that case, you should handle the error by checking the type of error returned. You can log the error and inform the user that there was a problem connecting to the database, suggesting they try again later.

Is there a way to centralize error handling in my Go application?

Yes, you can create a custom error type and a centralized error handling function that formats and logs errors consistently across your application.