Learn how to implement comprehensive authentication features in a full stack Next.js 15 project through this 42-minute video tutorial. Master the implementation of login and logout functionality, route protection with middleware, and user permissions using Kinde Auth integration. Follow along to configure environment variables, create necessary API routes, and set up Multi-Factor Authentication (MFA). Explore the step-by-step process of adding authentication to both new and existing Next.js codebases, while understanding the advantages of using Kinde Auth over building custom authentication solutions. Gain practical experience with TypeScript, Tailwind CSS, and ShadcN/ui components while building secure user authentication flows that include user management and permission settings.