- Добавил аутентификацию с помощью Spring Sequrity.

- Реализовал кастомные  CustomUserDetails и CustomUserDetailsService

https://www.youtube.com/watch?v=WDlifgLS8iQ&list=PLU2ftbIeotGoGSEUf54LQH-DgiQPF2XRO&index=3
https://spring.io/guides/gs/securing-web
https://medium.com/@CodeWithTech/spring-security-with-jdbcuserdetailsmanager-and-custom-userdetailsservice-a-complete-guide-248ddce0196c

.idea/dataSources.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="DataSourceManagerImpl" format="xml" multifile-model="true">
+    <data-source source="LOCAL" name="sweater_db@localhost" uuid="df35570d-4519-439c-b57d-a357161e7809">
+      <driver-ref>mysql.8</driver-ref>
+      <synchronize>true</synchronize>
+      <jdbc-driver>com.mysql.cj.jdbc.Driver</jdbc-driver>
+      <jdbc-url>jdbc:mysql://localhost:3306/sweater_db</jdbc-url>
+      <working-dir>$ProjectFileDir$</working-dir>
+    </data-source>
+  </component>
+</project>