Single Sign On With GitHub https://spring.io/guides/tutorials/spring-boot-oauth2/ https://github.com/spring-guides/tut-spring-boot-oauth2 Para registrar as aplicações no OAuth: Github: https://github.com/settings/developers Google: https://console.developers.google.com/apis/credentials exception:[authorization_request_not_found] https://stackoverflow.com/questions/50908023/using-spring-security-oauth-using-a-custom-oauth-provider-i-get-authorization