How to Configure ASP.NET Core Identity password policy

Opening your Startup class, then configure the identity settings in your startup class, like this.

services.Configure<IdentityOptions>(options =>
{
    options.Password.RequireDigit = false;
    options.Password.RequiredLength = 3;
    options.Password.RequireLowercase = true;
    options.Password.RequireNonLetterOrDigit = true;
    options.Password.RequireUppercase = false;
});

You can also configure identity when you add it as shown below.

services.AddIdentity<IdentityUser, IdentityRole>(options=> {
                options.Password.RequireDigit = false;
                options.Password.RequiredLength = 3;
                options.Password.RequireNonAlphanumeric = false;
                options.Password.RequireUppercase = false;
                options.Password.RequireLowercase = false;
            }).AddEntityFrameworkStores<ApplicationDbContext>().AddDefaultTokenProviders();