Govor/Govor.API/Program.cs

using System.Text;
using Govor.API.Extensions;
using Govor.API.Hubs;
using Govor.Application.Services;
using Microsoft.AspNetCore.Authentication.JwtBearer;
using Microsoft.IdentityModel.Tokens;
using Microsoft.OpenApi.Models;

var builder = WebApplication.CreateBuilder(args);

var configuration = builder.Configuration;
var services = builder.Services;

builder.Configuration.AddJsonFile("appsettings.json", optional: false, reloadOnChange: true);

builder.Services.AddCors(options =>
{
    options.AddPolicy("AllowFrontend", policy =>
    {
        policy.WithOrigins("http://localhost:3000", "https://localhost:3000")
            .AllowAnyHeader()
            .AllowAnyMethod()
            .AllowCredentials();
    });
});

builder.Services.Configure<JwtOption>(configuration.GetSection(nameof(JwtOption)));

// Add services
builder.Services.AddSignalR();

builder.Services.AddAuthentication(JwtBearerDefaults.AuthenticationScheme)
    .AddJwtBearer(JwtBearerDefaults.AuthenticationScheme, options =>
    {
        options.TokenValidationParameters = new TokenValidationParameters
        {
            ValidateIssuer = false,
            ValidateAudience = false,
            ValidateLifetime = true,
            ValidateIssuerSigningKey = true,
            IssuerSigningKey = new SymmetricSecurityKey(
                Encoding.UTF8.GetBytes(builder.Configuration["JwtOption:SecretKeу"]!))
        };
        options.Events = new JwtBearerEvents
        {
            OnMessageReceived = context =>
            {
                var accessToken = context.Request.Query["access_token"];
                var path = context.HttpContext.Request.Path;
                if (!string.IsNullOrEmpty(accessToken) && path.StartsWithSegments("/api/chats"))
                {
                    context.Token = accessToken;
                }
                return Task.CompletedTask;
            }
        };
    });

builder.Services.AddAuthorization(); 

builder.Services.AddControllers();

// Init DI
builder.Services.AddServices();
builder.Services.AddRepositories();
builder.Services.AddValidators();

builder.Services.AddGovorDbContext(configuration); // GovorDbContext init

builder.Services.AddEndpointsApiExplorer();

builder.Services.AddSwaggerGen(options =>
{
    options.SwaggerDoc("v1", new OpenApiInfo { Title = "Govor API", Version = "v1" });
    
    options.AddSecurityDefinition("Bearer", new OpenApiSecurityScheme
    {
        Description = "JWT Authorization header using the Bearer scheme. Example: 'Bearer {token}'",
        Name = "Authorization",
        In = ParameterLocation.Header,
        Type = SecuritySchemeType.Http,
        Scheme = "bearer"
    });
    
    options.AddSecurityRequirement(new OpenApiSecurityRequirement
    {
        {
            new OpenApiSecurityScheme
            {
                Reference = new OpenApiReference { Type = ReferenceType.SecurityScheme, Id = "Bearer" }
            },
            Array.Empty<string>()
        }
    });
});

//builder.Services.AddOpenApi();

var app = builder.Build();

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

app.UseHttpsRedirection();

app.UseRouting();

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

app.MapControllers();
app.MapHub<ChatsHub>("/api/chats"); 

app.MapSwagger().RequireAuthorization();

app.Map("/", () => "Not for browsers");

app.Run();