These tutorials target Micronaut Framework 3. Read, Guides for Micronaut Framework 4.

velocity

Error Handling
Learn about error handling in the Micronaut framework.
Tags: spock, geb, views, velocity, hibernate-validator, error, exception
Session based authentication
Learn how to secure a Micronaut application using Session based authentication.
Tags: spock, geb, session, security, views, velocity