Simple Spring Boot and React working example

https://developer.okta.com/blog/2018/07/19/simple-crud-react-and-spring-boot

Matt Raible is a boss and he is so straight to the point and precise.

Remember that if you have in your pom.xml the dependency spring-boot-starter-security, then Spring Boot will enable security by default with username "user" and a dynamically generated password:

https://docs.spring.io/spring-boot/docs/current/reference/html/boot-features-security.html

so for the time being I have excluded this dependency.

This https://www.baeldung.com/spring-security-login should explain more how to handle web security with the great fluent api provided by Spring.