Spring Security - Third Edition

Executing the OAuth 2 provider connection workflow

In order to save the provider details, we need to fetch the available details from the provider, available via the OAuth 2 connection. Next, we create a CalendarUser table from the available details. Note that we need to create at least one GrantedAuthority role. Here, we have used CalendarUserAuthorityUtils#createAuthorities to create ROLE_USER GrantedAuthority:

    //src/main/java/com/packtpub/springsecurity/authentication/    ProviderConnectionSignup.java    @Service    public class ProviderConnectionSignup implements ConnectionSignUp {         ...    @Override    public String execute(Connection<?> connection) {        UserProfile profile = connection.fetchUserProfile();        CalendarUser user = new CalendarUser(); if(profile.getEmail() ...