Implemented refreshing OAuth2 access token

Change-Id: I559ba31a96965d5fc2594935f179b7b3f1f2d66a
diff --git a/core/src/main/java/de/ids_mannheim/korap/exceptions/StatusCodes.java b/core/src/main/java/de/ids_mannheim/korap/exceptions/StatusCodes.java
index 2166813..d69dabd 100644
--- a/core/src/main/java/de/ids_mannheim/korap/exceptions/StatusCodes.java
+++ b/core/src/main/java/de/ids_mannheim/korap/exceptions/StatusCodes.java
@@ -134,15 +134,15 @@
     public static final int MISSING_REDIRECT_URI = 1807;
     public static final int INVALID_SCOPE = 1808;
     public static final int INVALID_AUTHORIZATION = 1809;
+    public static final int INVALID_REFRESH_TOKEN = 1810;
     
-    public static final int UNSUPPORTED_GRANT_TYPE = 1810;
-    public static final int UNSUPPORTED_AUTHENTICATION_METHOD = 1811;
+    public static final int UNSUPPORTED_GRANT_TYPE = 1811;
+    public static final int UNSUPPORTED_AUTHENTICATION_METHOD = 1812;
     
-    public static final int ID_TOKEN_CLAIM_ERROR = 1812;
-    public static final int ID_TOKEN_SIGNING_FAILED = 1813;
-    public static final int USER_REAUTHENTICATION_REQUIRED = 1814;
+    public static final int ID_TOKEN_CLAIM_ERROR = 1813;
+    public static final int ID_TOKEN_SIGNING_FAILED = 1814;
+    public static final int USER_REAUTHENTICATION_REQUIRED = 1815;
     
-
     /**
      * 1900 User account and logins
      */