public async Task RegisterUserAsync(string userName, string password)
{
var user = await _dbContext.Users.SingleOrDefaultAsync(x => x.UserName == userName);
if (user != null)
{
throw new MiniCloudException("User with this name already exists");
}
user = new User(userName, password);
await _dbContext.Users.AddAsync(user);
_directoryService.CreateUserDirectory(userName);
await _dbContext.SaveChangesAsync();
await _resourceAccessService.ShareAccessToResourceAsync(userName, userName, "");
}