fix(api): Corrected user groups base endpoint

Author: rlabbeptc

Kepware.Api.Test/ApiClient/ServerUserGroupTests.cs

@@ -14,7 +14,7 @@ namespace Kepware.Api.Test.ApiClient
 {
     public class ServerUserGroupTests : TestApiClientBase
     {
-        private const string ENDPOINT_USER_GROUP = "/config/v1/admin/server_user_groups";
+        private const string ENDPOINT_USER_GROUP = "/config/v1/admin/server_usergroups";
 
         [Fact]
         public async Task GetServerUserGroupAsync_ShouldReturnServerUserGroup_WhenApiRespondsSuccessfully()

Kepware.Api/Model/Admin/ServerUserGroup.cs

@@ -11,7 +11,7 @@ namespace Kepware.Api.Model.Admin
     /// <summary>
     /// Represents a user group in Kepware, allowing management of permissions and access control.
     /// </summary>
-    [Endpoint("/config/v1/admin/server_user_groups/{name}")]
+    [Endpoint("/config/v1/admin/server_usergroups/{name}")]
     public class ServerUserGroup : NamedEntity
     {
         /// <summary>
@@ -289,7 +289,7 @@ public bool? BrowseNamespace
         #endregion
     }
 
-    [Endpoint("/config/v1/admin/server_user_groups")]
+    [Endpoint("/config/v1/admin/server_usergroups")]
     public class ServerUserGroupCollection : EntityCollection<ServerUserGroup>
     {