public Task <IdentityUser> FindByIdAsync(string userId)
{
if (string.IsNullOrEmpty(userId))
{
throw new ArgumentException("Cannot match null or empty userId", "userId");
}
IdentityUser matchedUser = this.dbContext.IdentityUsers.FirstOrDefault(x => x.Id == userId);
if (matchedUser != null)
{
IdentityUser detachedUser = dbContext.CreateDetachedCopy(matchedUser);
return(Task.FromResult <IdentityUser>(detachedUser));
}
return(Task.FromResult <IdentityUser>(null));
}
