public override async Task <List <string> > TagContactList()
        {
            var request = new TagContactListRequest();

            var response = await grpcClient.TagContactListAsync(request);

            return(response.Ids.ToList());
        }
        public async Task <List <string> > TagContactList(string contactId = "")
        {
            var request = new TagContactListRequest();

            if (!string.IsNullOrEmpty(contactId))
            {
                request.ContactId = contactId;
            }

            var response = await grpcClient.TagContactListAsync(request);

            return(response.Ids.ToList());
        }