var roleManager = new RoleManager<Microsoft.AspNet.Identity.EntityFramework.IdentityRole>(new RoleStore<IdentityRole>(context));
            if (!roleManager.RoleExists("Admin"))
                roleManager.Create(new IdentityRole("Admin"));

            if (!roleManager.RoleExists("Guest"))
                roleManager.Create(new IdentityRole("Guest"));

            if (!roleManager.RoleExists("Librarian"))
                roleManager.Create(new IdentityRole("Librarian"));

            var userManager = new UserManager<ApplicationUser>(new UserStore<ApplicationUser>(context));
            string[] emails = { "a@a.a", "g@g.g", "l@l.l" };
            if (userManager.FindByEmail("a@a.a") == null)
            {
                var user = new ApplicationUser
                {
                    Email = "a@a.a",
                    UserName = "a@a.a",
                };

                var result = userManager.Create(user, "P@$$w0rd");
                if (result.Succeeded)
                    userManager.AddToRole(userManager.FindByEmail(user.Email).Id, "Admin");

            }

            if (userManager.FindByEmail("g@g.g") == null)
            {
                var user = new ApplicationUser
                {
                    Email = "g@g.g",
                    UserName = "g@g.g",
                };

                var result = userManager.Create(user, "P@$$w0rd");
                if (result.Succeeded)
                    userManager.AddToRole(userManager.FindByEmail(user.Email).Id, "Guest");
            }

            if (userManager.FindByEmail("l@l.l") == null)
            {
                var user = new ApplicationUser
                {
                    Email = "l@l.l",
                    UserName = "l@l.l",
                };

                var result = userManager.Create(user, "P@$$w0rd");
                if (result.Succeeded)
                    userManager.AddToRole(userManager.FindByEmail(user.Email).Id, "Librarian");

            }