fix defaults on Indentity (#13112)

aspnetcore/security/authentication/identity-configuration/sample/ScaffoldingReadme.txt

@@ -1,18 +0,0 @@
-Support for ASP.NET Core Identity was added to your project
-- The code for adding Identity to your project was generated under Areas/Identity.
-
-Configuration of the Identity related services can be found in the Areas/Identity/IdentityHostingStartup.cs file.
-
-
-The generated UI requires support for static files. To add static files to your app:
-1. Call app.UseStaticFiles() from your Configure method
-
-To use ASP.NET Core Identity you also need to enable authentication. To authentication to your app:
-1. Call app.UseAuthentication() from your Configure method (after static files)
-
-The generated UI requires MVC. To add MVC to your app:
-1. Call services.AddMvc() from your ConfigureServices method
-2. Call app.UseMvc() from your Configure method (after authentication)
-
-Apps that use ASP.NET Core Identity should also use HTTPS. To enable HTTPS see https://go.microsoft.com/fwlink/?linkid=848054.
-

aspnetcore/security/authentication/identity-configuration/sample/Startup.cs

@@ -61,7 +61,7 @@ namespace RPauth
             services.Configure<IdentityOptions>(options =>
             {
                 // Default SignIn settings.
-                options.SignIn.RequireConfirmedEmail = true;
+                options.SignIn.RequireConfirmedEmail = false;
                 options.SignIn.RequireConfirmedPhoneNumber = false;
             });
             #endregion
@@ -72,7 +72,7 @@ namespace RPauth
                 // Default User settings.
                 options.User.AllowedUserNameCharacters =
                         "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789-._@+";
-                options.User.RequireUniqueEmail = true;
+                options.User.RequireUniqueEmail = false;
 
             });
             #endregion