title: Spring Security Auth0 library throws error when Auth0 user is a Twitter social login
body: <p>Our server application uses the Spring Security Auth0 JAVA library to verify Java Web Tokens (JWTs). When the JWT is based on a user that used a social login through Twitter, the library throws a null pointer exception because the class Auth0UserInfo expects email_verified flag to exist in the JWT when email is present. I'm using an Auth0 rule to get the email via the Twitter api because Twitter does not give the email out. After this I try to add the flag email_verified = true in the same rule. I cannot add the email_verified flag to the user object in the rule because Auth0 seems to prevent it from being persisted. Is there a way to get both the email and the email_verified flag into the user object so that the jwt contains this information?</p>