Ok so I have a relationship between the ApplicationUser and QuestionResults, my models are as below, the userId nor the UserName is retrieved, but I really need the UserId setup as a foreignKey on the QuestionResults entity.

Any help is much appreciated the error that I am receiving is as below:

An exception of type 'System.NullReferenceException' occurred in STRA.dll but was not handled in user code

Additional information: Object reference not set to an instance of an object.
on these lines of code:

qr.User.Id = User.Identity.GetUserId();
qr.User.UserName = User.Identity.GetUserName();

Models

public class QuestionResult
    {
        public QuestionResult()
        {
            DateCreated = DateTime.Now;
            DateModified = DateTime.Now;
        }
        public int Id { get; set; }
        public DateTime? DateCreated { get; set; }
        public DateTime? DateModified { get; set; }
        public int QuestionScore { get; set; }
        //navigation properties
        public virtual ApplicationUser User { get; set; }
        //public ICollection<CategoryResult> CategoryResult { get; set; }
        //public virtual Category Category { get; set; }
        [NotMapped]
        public int CategoryId { get; set; }
        public virtual Question Question { get; set; }
        public int QuestionId { get; set; }
        //public virtual Category Category { get; set; }
        //public int CategoryId { get; set; }
    }
public class ApplicationUser : IdentityUser
    {
        public string FirstName { get; set; }
        public string Surname { get; set; }
        public string Industry { get; set; }
        public string GlobalRegion { get; set; }
        public string CurrentSituation { get; set; }
        public int SalesForceSize { get; set; }
        public bool IsVerified { get; set; }
        //navigation properties
        public virtual ICollection<CategoryResult> CategoryResult { get; set; }
        public virtual ICollection<QuestionResult> QuestionResult { get; set; }
        //public virtual ICollection<Report> Report { get; set; }
        //public virtual ICollection<SurveyResult> SurveyResult { get; set; }
        public virtual Organisation Organisation { get; set; }
        public int? OrganisationId { get; set; }

        public async Task<ClaimsIdentity> GenerateUserIdentityAsync(UserManager<ApplicationUser> manager)
        {
            // Note the authenticationType must match the one defined in CookieAuthenticationOptions.AuthenticationType
            var userIdentity = await manager.CreateIdentityAsync(this, DefaultAuthenticationTypes.ApplicationCookie);
            // Add custom user claims here
            return userIdentity;
        }

    }