intermediateSpring Security Fundamentals
What happens the instant you add `spring-boot-starter-security` to a project with zero configuration?
Every endpoint immediately requires authentication, a default in-memory user named `user` is created with a randomly generated password printed to the console log, and both form-login and HTTP Basic auth are enabled with CSRF protection on. This 'secure by default' stance means a REST API needs explicit configuration to loosen these defaults for its intended auth strategy rather than starting wide open.
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