diff --git a/DataCenter_Windows/WindowsDataCenter/Interfaces/IRepository.cs b/DataCenter_Windows/WindowsDataCenter/Interfaces/IRepository.cs
index 8e02407..6600e0f 100644
--- a/DataCenter_Windows/WindowsDataCenter/Interfaces/IRepository.cs
+++ b/DataCenter_Windows/WindowsDataCenter/Interfaces/IRepository.cs
@@ -12,7 +12,7 @@ namespace Interfaces
         /// Returns <see cref="UserList"/> with full list of users,
         /// plus a total user count. Pagination options are supported.
         /// </returns>
-        UserList GetUsers(int pageNumber=-1, int pageSize=-1);
+        UserList GetUsers(int pageNumber = -1, int pageSize = -1, int groupId = -1);
         /// <summary>
         /// Search the user list for the following string
         /// </summary>
@@ -99,6 +99,7 @@ namespace Interfaces
 
         OperationResponse CreateGroup(Group group, out int groupId);
         List<Group> GetGroups(int userId = -1);
+        Group GetGroup(int groupId);
         OperationResponse UpdateGroup(Group group);
         OperationResponse DeleteGroup(int groupId);
     }