Added user info web-service (solved #566)

Change-Id: I2f0d2c4866698608c18ba665a5d6405e170a5d5f
diff --git a/core/src/main/java/de/ids_mannheim/korap/authentication/http/HttpAuthorizationHandler.java b/core/src/main/java/de/ids_mannheim/korap/authentication/http/HttpAuthorizationHandler.java
index 2470d4e..241e9ce 100644
--- a/core/src/main/java/de/ids_mannheim/korap/authentication/http/HttpAuthorizationHandler.java
+++ b/core/src/main/java/de/ids_mannheim/korap/authentication/http/HttpAuthorizationHandler.java
@@ -38,7 +38,7 @@
                     "Cannot parse authorization header value "
                             + authorizationHeader
                             + ". Use this format: [authentication "
-                            + "scheme] [Base64-encoded token]",
+                            + "scheme] [authentication token]",
                     authorizationHeader);
         }
 
diff --git a/core/src/main/java/de/ids_mannheim/korap/constant/OAuth2Scope.java b/core/src/main/java/de/ids_mannheim/korap/constant/OAuth2Scope.java
index b581faf..5055972 100644
--- a/core/src/main/java/de/ids_mannheim/korap/constant/OAuth2Scope.java
+++ b/core/src/main/java/de/ids_mannheim/korap/constant/OAuth2Scope.java
@@ -27,6 +27,8 @@
     SERIALIZE_QUERY,
     MATCH_INFO, 
     
+    USER_INFO,
+    
     USER_GROUP_INFO, 
     CREATE_USER_GROUP, 
     DELETE_USER_GROUP,