How override ASP.NET Core Identity’s password policy

It’s sooooo simple in the end …

No need to override any class, you have just to configure the identity settings in your startup class, like this :

services.Configure<IdentityOptions>(options =>
{
    options.Password.RequireDigit = false;
    options.Password.RequiredLength = 5;
    options.Password.RequireLowercase = true;
    options.Password.RequireNonLetterOrDigit = true;
    options.Password.RequireUppercase = false;
});

Or you can configure identity when you add it :

services.AddIdentity<ApplicationUser, IdentityRole>(options=> {
                options.Password.RequireDigit = false;
                options.Password.RequiredLength = 4;
                options.Password.RequireNonAlphanumeric = false;
                options.Password.RequireUppercase = false;
                options.Password.RequireLowercase = false;
            })
                .AddEntityFrameworkStores<SecurityDbContext>()
                .AddDefaultTokenProviders();

AS.NET Core is definitively good stuff …