Align UserInfo Access Token JWTs to standards
As of https://tools.ietf.org/html/rfc6749#section-3.3 the value of the scope parameter is expressed as a list of space- delimited, case-sensitive strings.
As of https://tools.ietf.org/html/draft-ietf-oauth-access-token-jwt-02 the typ header parameter for a JWT access token MUST be at+jwt