Based on: https://medium.com/@kamleshbadgujar00/secure-spring-boot-angular-9-application-using-keycloak-1-3-b00e801ba693 https://medium.com/@kamleshbadgujar00/secure-spring-boot-angular-9-application-using-keycloak-2-3-bf98ba360d66 https://medium.com/@kamleshbadgujar00/integrating-angular-application-with-keycloak-3-3-8aee940897e