public GrupoManager()
 {
     _db = HttpContext.Current
           .GetOwinContext().Get <ApplicationDbContext>();
     _userManager = HttpContext.Current
                    .GetOwinContext().GetUserManager <ApplicationUserManager>();
     _roleManager = HttpContext.Current
                    .GetOwinContext().Get <ApplicationRoleManager>();
     _groupStore = new GrupoStore(_db);
 }
 public GrupoManager()
 {
     _db = HttpContext.Current
         .GetOwinContext().Get<ApplicationDbContext>();
     _userManager = HttpContext.Current
         .GetOwinContext().GetUserManager<ApplicationUserManager>();
     _roleManager = HttpContext.Current
         .GetOwinContext().Get<ApplicationRoleManager>();
     _groupStore = new GrupoStore(_db);
 }