DD.WellWorkover.Cloud/AsbCloudWebApi/SignalR/BaseHub.cs

using System.Threading;
using System.Threading.Tasks;
using Microsoft.AspNetCore.SignalR;

namespace AsbCloudWebApi.SignalR;

public abstract class BaseHub<T> : Hub<T> where T : class
{
   public virtual Task AddToGroup(string groupName) =>
      Groups.AddToGroupAsync(Context.ConnectionId, groupName);

   public virtual Task RemoveFromGroup(string groupName) =>
      Groups.RemoveFromGroupAsync(Context.ConnectionId, groupName);   
}