Program.cs

using Microsoft.AspNetCore.Authentication.JwtBearer;
using Microsoft.AspNetCore.Identity;
using Microsoft.EntityFrameworkCore;
using Microsoft.IdentityModel.Tokens;
using System.Text;
using WeatherApp.SecureAuth;
using WeatherApp2.Models;
using WeatherApp2.Repository;

var builder = WebApplication.CreateBuilder(args);
ConfigurationManager configuration = builder.Configuration;

// Add services to the container.

// Confifugure to use Sql using Entity Framework
builder.Services.AddDbContext<AppDbContext>(options => options.UseSqlServer(configuration.GetConnectionString("Connection")));

builder.Services.AddDbContext<WeatherDbContext>(options => options.UseSqlServer(configuration.GetConnectionString("Connection")));

//Added Identity Service
builder.Services.AddIdentity<IdentityUser, IdentityRole>()
    .AddEntityFrameworkStores<AppDbContext>()
    .AddDefaultTokenProviders();

//Add Dependency Injection Lifetime
builder.Services.AddScoped<IWeatherRepository, WeatherRepository>();

// Added Authentication Service
builder.Services.AddAuthentication(options =>
{
    options.DefaultAuthenticateScheme = JwtBearerDefaults.AuthenticationScheme;
    options.DefaultChallengeScheme = JwtBearerDefaults.AuthenticationScheme;
    options.DefaultScheme = JwtBearerDefaults.AuthenticationScheme;
})

// Added Jwt Bearer
.AddJwtBearer(options =>
{
    options.SaveToken = true;
    options.RequireHttpsMetadata = false;
    options.TokenValidationParameters = new TokenValidationParameters()
    {
        ValidateIssuer = true,
        ValidateAudience = true,
        ValidAudience = configuration["JWT:ValidAudience"],
        ValidIssuer = configuration["JWT:ValidIssuer"],
        IssuerSigningKey = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(configuration["JWT:Secret"]))
    };
});

builder.Services.AddControllers();

builder.Services.AddEndpointsApiExplorer();
builder.Services.AddSwaggerGen();

var app = builder.Build();

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

app.UseHttpsRedirection();

// Authentication & Authorization middleware configuration
app.UseAuthentication();
app.UseAuthorization();

app.MapControllers();

app.Run();