Program.cs

using System.Text;
using System.Text.Json.Serialization;
using JwtRoleAuthentication.Data;
using Microsoft.AspNetCore.Authentication.JwtBearer;
using Microsoft.AspNetCore.Identity;
using JwtRoleAuthentication.Models;
using Microsoft.EntityFrameworkCore;
using Microsoft.IdentityModel.Tokens;
using Microsoft.OpenApi.Models;
using JwtRoleAuthentication.Services;


var builder = WebApplication.CreateBuilder(args);

builder.Services.AddControllers();
builder.Services.AddEndpointsApiExplorer();

builder.Services.AddSwaggerGen(option =>
{
    option.SwaggerDoc("v1", new OpenApiInfo { Title = "Test API", Version = "v1" });
    option.AddSecurityDefinition("Bearer", new OpenApiSecurityScheme
    {
        In = ParameterLocation.Header,
        Description = "Please enter a valid token",
        Name = "Authorization",
        Type = SecuritySchemeType.Http,
        BearerFormat = "JWT",
        Scheme = "Bearer"
    });
    option.AddSecurityRequirement(new OpenApiSecurityRequirement
    {
        {
            new OpenApiSecurityScheme
            {
                Reference = new OpenApiReference
                {
                    Type = ReferenceType.SecurityScheme,
                    Id = "Bearer"
                }
            },
            new string[] { }
        }
    });
});

builder.Services.AddProblemDetails();
builder.Services.AddApiVersioning();
builder.Services.AddRouting(options => options.LowercaseUrls = true);

builder.Services.AddDbContext<ApplicationDbContext>(opt =>
    opt.UseNpgsql("Host=localhost;Database=postgres;Username=postgres;Password=devpass"));

builder.Services.AddScoped<TokenService, TokenService>();

builder.Services.AddControllers().AddJsonOptions(opt =>
{
    opt.JsonSerializerOptions.Converters.Add(new JsonStringEnumConverter());
});


builder.Services
    .AddIdentity<ApplicationUser, IdentityRole>(options =>
    {
        options.SignIn.RequireConfirmedAccount = false;
        options.User.RequireUniqueEmail = true;
        options.Password.RequireDigit = false;
        options.Password.RequiredLength = 6;
        options.Password.RequireNonAlphanumeric = false;
        options.Password.RequireUppercase = false;
    })
    .AddRoles<IdentityRole>()
    .AddEntityFrameworkStores<ApplicationDbContext>();


var validIssuer = builder.Configuration.GetValue<string>("JwtTokenSettings:ValidIssuer");
var validAudience = builder.Configuration.GetValue<string>("JwtTokenSettings:ValidAudience");
var symmetricSecurityKey = builder.Configuration.GetValue<string>("JwtTokenSettings:SymmetricSecurityKey");

builder.Services.AddAuthentication(options =>
    {
        options.DefaultAuthenticateScheme = JwtBearerDefaults.AuthenticationScheme;
        options.DefaultChallengeScheme = JwtBearerDefaults.AuthenticationScheme;
        options.DefaultScheme = JwtBearerDefaults.AuthenticationScheme;
    })
    .AddJwtBearer(options =>
    {
        options.IncludeErrorDetails = true;
        options.TokenValidationParameters = new TokenValidationParameters()
        {
            ClockSkew = TimeSpan.Zero,
            ValidateIssuer = true,
            ValidateAudience = true,
            ValidateLifetime = true,
            ValidateIssuerSigningKey = true,
            ValidIssuer = validIssuer,
            ValidAudience = validAudience,
            IssuerSigningKey = new SymmetricSecurityKey(
                Encoding.UTF8.GetBytes(symmetricSecurityKey)
            ),
        };
    });

var app = builder.Build();


if (app.Environment.IsDevelopment())
{
    app.UseSwagger();
    app.UseSwaggerUI();
}

app.UseHttpsRedirection();
app.UseStatusCodePages();

app.UseAuthentication();
app.UseAuthorization();
app.MapControllers();
app.Run();