async public Task <ApplicationUser> FindByIdAsync(string userId, CancellationToken cancellationToken)
 {
     return(await _dbContext.FindByIdAsync(userId, cancellationToken));
 }
 async protected Task LoadCurrentApplicationUserAsync(string id)
 {
     this.CurrentApplicationUser = await _userDbContext.FindByIdAsync(id, CancellationToken.None);
 }