Program.cs

using api.Data;
using api.Interfaces;
using api.Models;
using api.Repository;
using api.Service;
using Microsoft.AspNetCore.Authentication.JwtBearer;
using Microsoft.AspNetCore.Identity;
using Microsoft.EntityFrameworkCore;
using Microsoft.IdentityModel.Tokens;

var builder = WebApplication.CreateBuilder(args);

// Add services to the container.
// Learn more about configuring OpenAPI at https://aka.ms/aspnet/openapi
builder.Services.AddOpenApi();

builder.Services.AddControllers();

builder.Services.AddDbContext<ApplicationDBContext>(options => {
    options.UseSqlServer(builder.Configuration.GetConnectionString("DefaultConnection"));
});
builder.Services.AddScoped<IStockRepository,StockRepository>();
builder.Services.AddScoped<ICommentsRepository,CommentsRepository>();
builder.Services.AddScoped<ITokenService, TokenService>();
builder.Services.AddScoped<IPortfolioRepository, PortfolioRepository>();

builder.Services.AddControllers().AddNewtonsoftJson(options =>
{
    options.SerializerSettings.ReferenceLoopHandling = Newtonsoft.Json.ReferenceLoopHandling.Ignore;
});
builder.Services.AddIdentity<AppUser,IdentityRole>(x =>{
    x.Password.RequireDigit = true;    
    x.Password.RequiredLength = 4;
    x.Password.RequireNonAlphanumeric = false;
    x.Password.RequireLowercase = false;
    x.Password.RequireUppercase = false;
}).AddEntityFrameworkStores<ApplicationDBContext>();
builder.Services.AddAuthentication(options=>{
    options.DefaultAuthenticateScheme = 
    options.DefaultChallengeScheme = 
    options.DefaultForbidScheme = 
    options.DefaultScheme = 
    options.DefaultSignInScheme = 
    options.DefaultSignOutScheme = JwtBearerDefaults.AuthenticationScheme;
}).AddJwtBearer(options=>
{
#pragma warning disable CS8604 // Possible null reference argument.
    options.TokenValidationParameters = new TokenValidationParameters
    {
        ValidateIssuer = true,
        ValidIssuer = builder.Configuration["JWT:Issuer"],
        ValidateAudience = true,
        ValidAudience = builder.Configuration["JWT:Audience"],
        ValidateIssuerSigningKey = true,
        IssuerSigningKey = new SymmetricSecurityKey(
            System.Text.Encoding.UTF8.GetBytes(builder.Configuration["JWT:SigningKey"])
        )
    };
#pragma warning restore CS8604 // Possible null reference argument.
});
var app = builder.Build();

// Configure the HTTP request pipeline.
if (app.Environment.IsDevelopment())
{
    app.MapOpenApi();
}

app.UseHttpsRedirection();

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

app.MapControllers();
app.Run();