http://websystique.com/spring-security/secure-spring-rest-api-using-oauth2/
GET http://localhost:8080/SpringSecurityOAuth2Example/user/?access_token=[TOKEN]
Note: You must add an authorization header with client credentials [my-trusted-client/secret].
POST REFRESH TOKEN http://localhost:8080/SpringSecurityOAuth2Example/oauth/token?grant_type=refresh_token&refresh_token=[REFRESH_TOKEN]