https://hellokoding.com/hello-single-sign-on-sso-with-json-web-token-jwt-spring-boot/
https://github.com/mefernandez/spring-multi-module-oauth-sso
https://github.com/prasenjit-net/sso-demo
https://github.com/making/oauth2-sso-demo
https://github.com/Prussia/playSSO
https://github.com/ryan-shi/spring-boot-sso
https://github.com/hellokoding/single-sign-on-out-auth-jwt-cookie-redis-springboot-freemarker
https://github.com/hellokoding/hello-sso-jwt
https://github.com/hellokoding/hello-sso-jwt-auth