diff --git a/DataCenter_Windows/WindowsDataCenter/Interfaces/Group.cs b/DataCenter_Windows/WindowsDataCenter/Interfaces/Group.cs
new file mode 100644
index 0000000..2ac5f16
--- /dev/null
+++ b/DataCenter_Windows/WindowsDataCenter/Interfaces/Group.cs
@@ -0,0 +1,16 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Interfaces
+{
+    public class Group
+    {
+        public int Id { get; set; }
+        public string Name { get; set; }
+        public int UserCount { get; set; }
+        public bool IsAssociatedToUser { get; set; }
+    }
+}
diff --git a/DataCenter_Windows/WindowsDataCenter/Interfaces/Interfaces.csproj b/DataCenter_Windows/WindowsDataCenter/Interfaces/Interfaces.csproj
index 90c1283..79a3e8f 100644
--- a/DataCenter_Windows/WindowsDataCenter/Interfaces/Interfaces.csproj
+++ b/DataCenter_Windows/WindowsDataCenter/Interfaces/Interfaces.csproj
@@ -42,6 +42,7 @@
   <ItemGroup>
     <Compile Include="AppDetails.cs" />
     <Compile Include="DailyLogs.cs" />
+    <Compile Include="Group.cs" />
     <Compile Include="ILogger.cs" />
     <Compile Include="IRepository.cs" />
     <Compile Include="Identifier.cs" />
diff --git a/DataCenter_Windows/WindowsDataCenter/Interfaces/User.cs b/DataCenter_Windows/WindowsDataCenter/Interfaces/User.cs
index 406824e..0774d15 100644
--- a/DataCenter_Windows/WindowsDataCenter/Interfaces/User.cs
+++ b/DataCenter_Windows/WindowsDataCenter/Interfaces/User.cs
@@ -23,6 +23,7 @@ namespace Interfaces
         public DateTime LastEventDateTime { get; set; }
         public List<Identifier> AssociatedIdentifiers { get; set; }
 
+        public List<Group> Groups { get; set; }
         public bool State { get; set; }
     }
 }
\ No newline at end of file