Program.cs

using System.Text;
using Microsoft.AspNetCore.Authentication.JwtBearer;
using Microsoft.Extensions.Options;
using Microsoft.IdentityModel.Tokens;
using WhatsAppFinalApi.Auth;
using WhatsAppFinalApi.Messages;

var builder = WebApplication.CreateBuilder(args);

// Add services to the container.
builder.Services.AddControllers();

// Learn more about configuring Swagger/OpenAPI at https://aka.ms/aspnetcore/swashbuckle
builder.Services.AddEndpointsApiExplorer();
builder.Services.AddSwaggerGen();

builder.Services.AddCors(options => options.AddDefaultPolicy(policy =>
{
    policy.WithOrigins(["http://localhost:4201"]);
    policy.AllowAnyHeader();
    policy.AllowAnyMethod();
    policy.AllowCredentials();
    policy.SetIsOriginAllowed(_ => true);
}));

builder.Services.AddAuthentication(options =>
{
    options.DefaultScheme = JwtBearerDefaults.AuthenticationScheme;
    options.DefaultChallengeScheme = JwtBearerDefaults.AuthenticationScheme;
}).AddJwtBearer(options =>
{
    var secretByte = Encoding.UTF8.GetBytes(AuthSettings.JwtSecret);
    var secretKey = new SymmetricSecurityKey(secretByte);

    options.TokenValidationParameters = new TokenValidationParameters
    {
        ValidateAudience = false,
        ValidateIssuer = false,
        ValidateLifetime = false,
        ValidateIssuerSigningKey = true,
        IssuerSigningKey = secretKey,
    };

    options.Events = new JwtBearerEvents()
    {
        OnMessageReceived = context =>
        {
            var token = context.Request.Query["access_token"];
            context.Token ??= token;

            return Task.CompletedTask;
        }
    };
});

builder.Services.Configure<JwtSettingsOptions>(
    builder.Configuration.GetRequiredSection(JwtSettingsOptions.SessionName));

builder.Services.AddSingleton(provider =>
    provider.GetRequiredService<IOptions<JwtSettingsOptions>>().Value);

builder.Services.AddSignalR();

var app = builder.Build();

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

app.UseCors();

// app.UseHttpsRedirection();

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

app.MapControllers();

app.MapHub<MessageHub>("/api/message-hub");

app.Run();