This summary provides an overview of a tutorial on implementing passwordless authentication using a blockchain wallet and FaunaDB in a Next.js application. The tutorial demonstrates how to create a secure login flow using MetaMask, with all user data stored in a Fauna database. It covers the pre-requisites for the solution, including familiarity with MetaMask wallet and React.js/Next.js. The tutorial provides step-by-step instructions on creating a new application, configuring the backend, and implementing the authentication logic. It also discusses how to encapsulate logic with user-defined functions (UDFs) and queries Fauna resources using an access token. Finally, it covers logging out users by removing the access token from the cookie store in the application.