IM_NEW/GroupService.WebApi/Application/GroupInvitation/GroupInvitationHandleCommand.cs

namespace GroupService.WebApi.Application.GroupInvitation
{
    public record GroupInvitationHandleCommand(Guid InvitationId, Guid UserId, GroupInvitationAction Action);
    public enum GroupInvitationAction
    {
        Accept = 0,
        Reject = 1
    }
}