springboot-auth-magic-link

Passwordless email login in Spring Boot is implemented by generating time-bound magic links sent to a user's email for one-time authentication. This approach requires migrations, controllers, and mail configuration to deliver a complete login flow without passwords.

A magic link is a secure, time-bound URL sent to a user's email that authenticates them upon clicking. Spring Boot validates the embedded token against stored credentials, granting access without requiring a password.

Yes, magic link authentication can operate alongside Google OAuth2 in Spring Boot. You can offer both passwordless email login and OAuth2 as flexible, coexisting authentication options for your users.

Setting up magic link authentication involves configuring Spring Boot mail services, database migrations for secure token handling, and controllers to generate and validate tokens. Scheduling is also required for expired token cleanup to ensure production readiness.

Secure token handling requires storing tokens with expiration timestamps in your database. Spring Boot scheduling can then automatically clean up expired tokens to maintain production-ready security and prevent replay attacks.

Passwordless authentication reduces user onboarding friction by eliminating password creation and recall. Spring Boot magic links streamline the login process, sending users a one-time secure link to access the application instantly.