public async void SaveChanges()
 {
     try
     {
         await propertiesRepository.CreateOrUpdateAsync(Identifier, Properties);
     }
     catch (Exception ex)
     {
         await loggerService.LogAsync(ex.Message);
     }
 }
        /// <summary>
        /// Заносит пользователя в кеш
        /// </summary>
        /// <param name="identifier"></param>
        /// <param name="user"></param>
        private async Task SyncUser(long identifier, UserData user)
        {
            if (user == null)
            {
                return;
            }

            var properties = await propertiesRepository.ReadAsync(identifier);

            properties[ViewConstants.CachedDbUser] = JsonSerializer.ToJsonString(user);

            await propertiesRepository.CreateOrUpdateAsync(identifier, properties);
        }