ASP.NET MVC 5. Identity. How to get data from a separate table?

Question

ASP.NET

How to unload additional data about the user through the UserManager, which is stored in a separate table, which is connected on a one-to-one basis with the main table (AspNetUsers)
Now for more details:
in the class ApplicationUser : IdentityUser
, the property
public UserProfile UserProfile { get; set; }
and here is the model itself:

public class UserProfile
    {
        [Key,ForeignKey("ApplicationUser")]
        public string ID { get; set; }
        public ApplicationUser ApplicationUser { get; set; }

        public DateTime? Birthday { get; set; }       
    }

When registering a new user, the following is done:

newUser.UserProfile = new UserProfile {Birthday=birthday,ID = newUser.Id};
UserManager.Update(newUser);

All this business is successfully carried out and saved in a DB.
But when I try to fetch user profile data via UserManager

ApplicationUser user = await UserManager.FindByNameAsync(userName)

user.UserProfile always = null
That is, FindByUsername retrieves only the main data, without those that are in separate tables.
How can I extract complete information through the UserManager, which includes data in related tables?
for example to have the same result

сontext.Users.Include(Users => Users.UserProfile).Single(u => u.UserName==User.Identity.Name);

---
And one more thing: I understand that in order to retrieve data from the database asynchronously, you need to pack each request into a method like Task GetSomethingAsync() ?
Isn't there anything easier?

Answer 1

Maybe you just disabled the loading of related objects in EF? Look at the LazyLoadingEnabled property of the context.