Program.cs

using Microsoft.EntityFrameworkCore;
using ProjetoEscola_API.Data;
using Microsoft.AspNetCore.Authentication.JwtBearer;
using Microsoft.IdentityModel.Tokens;
using Newtonsoft.Json.Serialization;
using Microsoft.Extensions.FileProviders;
using System.IO;
using System.Text;

var builder = WebApplication.CreateBuilder(args);

ConfigurationManager configuration = builder.Configuration;

//Criando o CORS
var MyAllowSpecificOrigins = "_myAllowSpecificOrigins";

// Add services to the container.

//Fazendo o builder do CORS
builder.Services.AddCors(options =>
{
    options.AddPolicy(MyAllowSpecificOrigins, builder =>
    {
        builder.WithOrigins("http://localhost").AllowAnyOrigin().AllowAnyMethod().AllowAnyHeader();
        builder.SetIsOriginAllowed(origin => new Uri(origin).Host == "localhost");
        builder.SetIsOriginAllowed(origin => true);
    });
});

builder.Services.AddAuthentication(options =>
{
    options.DefaultAuthenticateScheme = JwtBearerDefaults.AuthenticationScheme;
    options.DefaultChallengeScheme = JwtBearerDefaults.AuthenticationScheme;
    options.DefaultScheme = JwtBearerDefaults.AuthenticationScheme;
})
.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();
// Add DbContext
builder.Services.AddDbContext<EscolaContext>(options =>
{
    options.UseSqlServer(builder.Configuration.GetConnectionString("StringConexaoSQLServer"));
});
var app = builder.Build();
// Configure the HTTP request pipeline.
if (app.Environment.IsDevelopment())
{
    app.UseSwagger();
    app.UseSwaggerUI();
}
//app.UseHttpsRedirection();

//Allow CORS
app.UseCors(MyAllowSpecificOrigins);

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