Web Development Tutorial

Authentication

This section covers the fundamental concepts of user authentication. Understanding authentication is crucial for building secure web applications.

Learn about different authentication methods like username/password, OAuth, and more.

This tutorial will guide you through the basics of verifying user credentials.

Authorization

Authorization defines what a user is allowed to do after they are authenticated.

It ensures users have only the privileges they're granted.

Understanding authorization allows for granular control over user access.

Key Concepts

Common terms: User, Authentication, Authorization, Role, Permissions

Role: A predefined set of permissions.

Permissions: Specific actions a user can perform.

Code Example (JavaScript) - Verification

This is a simple example to demonstrate checking a username against a database.

function verifyUsername(username) {
  // Simulate a database check
  if (username === "johnDoe") {
    return true;
  } else {
    return false;
  }
}

This function verifies if the username is correct.

Consider expanding this with error handling and more robust validation.

Consider using a more sophisticated authentication mechanism in a real application.