I have a member login built using UmbracoIdentity. (https://github.com/Shazwazza/UmbracoIdentity)

The UserManager in the below code is returned as null. I have included the property that gets the UserManager.

Why would this be null? Is this something to do with the UmbracoIdentity package or is it due to upgrades to 7.3 that break identity? I have read some rumblings about changes in 7.3 that could cause this but nothing specific enough for me to be sure.

Any suggested fixes either way would be amazing!

    [HttpPost]
    [AllowAnonymous]
    public async Task<ActionResult> HandleLogin([Bind(Prefix = "loginModel")] LoginModel model)
    {
        if (ModelState.IsValid)
        {
            // UserManager is null here - WHY!?
            var user = await UserManager.FindAsync(model.Username, model.Password);
            if (user != null)
            {
                await SignInAsync(user, true);
                return RedirectToCurrentUmbracoPage();
            }
            ModelState.AddModelError("loginModel", "Invalid username or password");
        }

        return CurrentUmbracoPage();
    }

    public UmbracoMembersUserManager<UmbracoApplicationMember> UserManager
    {
        get
        {
            return _userManager ?? (_userManager = OwinContext
                .GetUserManager<UmbracoMembersUserManager<UmbracoApplicationMember>>());
        }
    }