How do I sign in to Razor Pages?

Question

ASP.NET

Good afternoon !
A friend has a website, there are only 4 pages and there is authorization.
Passwords are stored in the database hashed md5.
There are many users.
It is necessary to use the authorization check on page 1.
I also found in the documentation how to do this, but as I understand it, it only works for Identy

using System;
using Microsoft.AspNetCore.Authentication.Cookies;
using Microsoft.AspNetCore.Builder;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;

var builder = WebApplication.CreateBuilder(args);

builder.Services.AddRazorPages(options =>
{
    options.Conventions.AuthorizePage("/user");
});

builder.Services.AddSession(options =>
{
    options.IdleTimeout = TimeSpan.FromMinutes(1800);
    //options.Cookie.HttpOnly = true;
    //options.Cookie.IsEssential = true;
});

builder.Services.AddDistributedMemoryCache();

builder.Services.AddAuthentication(CookieAuthenticationDefaults.AuthenticationScheme).AddCookie();
builder.Services.AddAuthorization();


var app = builder.Build();

// Configure the HTTP request pipeline.
if (!app.Environment.IsDevelopment())
{
    app.UseExceptionHandler("/Error");
    // The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
    app.UseHsts();
}


app.UseHttpsRedirection();
app.UseStaticFiles();

app.UseRouting();

app.UseAuthorization();
app.UseAuthentication();
app.UseSession();

app.MapRazorPages();

app.Run();

I think putting Identy is not an option because you need the most basic functions to work with your account

Answer 1

Create two authorization options on test projects, after which you can choose which one suits you best.
https://youtu.be/7zaKdNqGzk8?list=PLUTrDHuvZc4EDn8... - creation from scratch, will allow you to understand at a low level.
https://metanit.com/sharp/aspnet5/15.5.php - authorization by roles. Also on this resource 4 more different ways of authorization are provided.