cannot create an instance using UserStore

[kelumKP]

I've changed my code according to your resources.

following section Inside the IdentityConfig.cs

    // Configure the application user manager used in this application. UserManager is defined in ASP.NET Identity and is used by the application.
    public class ApplicationUserManager : UserManager<ApplicationUser>
    {
        public ApplicationUserManager(IUserStore<ApplicationUser> store)
            : base(store)
        {
        }

        public static ApplicationUserManager Create(IdentityFactoryOptions<ApplicationUserManager> options, IOwinContext context) 
        {
            var manager = new ApplicationUserManager(new UserStore<ApplicationUser>(context.Get<ApplicationDbContext>()));
            // Configure validation logic for usernames
            manager.UserValidator = new UserValidator<ApplicationUser>(manager)
            {
                AllowOnlyAlphanumericUserNames = false,
                RequireUniqueEmail = true
            };

            // Configure validation logic for passwords
            manager.PasswordValidator = new PasswordValidator
            {
                RequiredLength = 6,
                RequireNonLetterOrDigit = true,
                RequireDigit = true,
                RequireLowercase = true,
                RequireUppercase = true,
            };

            // Configure user lockout defaults
            manager.UserLockoutEnabledByDefault = true;
            manager.DefaultAccountLockoutTimeSpan = TimeSpan.FromMinutes(5);
            manager.MaxFailedAccessAttemptsBeforeLockout = 5;

            // Register two factor authentication providers. This application uses Phone and Emails as a step of receiving a code for verifying the user
            // You can write your own provider and plug it in here.
            manager.RegisterTwoFactorProvider("Phone Code", new PhoneNumberTokenProvider<ApplicationUser>
            {
                MessageFormat = "Your security code is {0}"
            });
            manager.RegisterTwoFactorProvider("Email Code", new EmailTokenProvider<ApplicationUser>
            {
                Subject = "Security Code",
                BodyFormat = "Your security code is {0}"
            });
            manager.EmailService = new EmailService();
            manager.SmsService = new SmsService();
            var dataProtectionProvider = options.DataProtectionProvider;
            if (dataProtectionProvider != null)
            {
                manager.UserTokenProvider = 
                    new DataProtectorTokenProvider<ApplicationUser>(dataProtectionProvider.Create("ASP.NET Identity"));
            }
            return manager;
        }
    }

then I changed IdentityModel.cs as follows

    // You will not likely need to customize there, but it is necessary/easier to create our own 
    // project-specific implementations, so here they are:
    public class ApplicationUserLogin : IdentityUserLogin<string> { }
    public class ApplicationUserClaim : IdentityUserClaim<string> { }
    public class ApplicationUserRole : IdentityUserRole<string> { }

    //Must be expressed in terms of our custom Role and other types:
    public class ApplicationUser : IdentityUser<string, ApplicationUserLogin, ApplicationUserRole, ApplicationUserClaim>
    {
        public ApplicationUser()
        {
            this.Id = Guid.NewGuid().ToString();

            // Add any custom User properties/code here

        }

     ///******************************* I added custom properties here *************************************

        public async Task<ClaimsIdentity>
            GenerateUserIdentityAsync(ApplicationUserManager manager)
        {
            var userIdentity = await manager
                .CreateIdentityAsync(this, DefaultAuthenticationTypes.ApplicationCookie);
            return userIdentity;
        }
    }



    // Must be expressed in terms of our custom UserRole:
    public class ApplicationRole : IdentityRole<string, ApplicationUserRole>
    {
        public ApplicationRole()
        {
            this.Id = Guid.NewGuid().ToString();
        }

        public ApplicationRole(string name)
            : this()
        {
            this.Name = name;
        }

        // Add any custom Role properties/code here
    }


    // Must be expressed in terms of our custom types:
    public class ApplicationDbContext
        : IdentityDbContext<ApplicationUser, ApplicationRole,
        string, ApplicationUserLogin, ApplicationUserRole, ApplicationUserClaim>
    {
        public ApplicationDbContext()
            : base("DefaultConnection")
        {
        }

        //static ApplicationDbContext()
        //{
        //    Database.SetInitializer<ApplicationDbContext>(new ApplicationDbInitializer());
        //}

        public static ApplicationDbContext Create()
        {
            return new ApplicationDbContext();
        }

        // Add additional items here as needed
    }

    // Most likely won't need to customize these either, but they were needed because we implemented
    // custom versions of all the other types:
    public class ApplicationUserStore
            : UserStore<ApplicationUser, ApplicationRole, string,
                ApplicationUserLogin, ApplicationUserRole,
                ApplicationUserClaim>, IUserStore<ApplicationUser, string>,
            IDisposable
    {
        public ApplicationUserStore()
            : this(new IdentityDbContext())
        {
            base.DisposeContext = true;
        }

        public ApplicationUserStore(DbContext context)
            : base(context)
        {
        }
    }


    public class ApplicationRoleStore
    : RoleStore<ApplicationRole, string, ApplicationUserRole>,
    IQueryableRoleStore<ApplicationRole, string>,
    IRoleStore<ApplicationRole, string>, IDisposable
    {
        public ApplicationRoleStore()
            : base(new IdentityDbContext())
        {
            base.DisposeContext = true;
        }

        public ApplicationRoleStore(DbContext context)
            : base(context)
        {
        }
    }

then I cannot sign in properly with correct credentials

getting this error

"The view 'Index' or its master was not found or no view engine supports the searched locations. The following locations were searched:"