title: Asp.net Core - IdentityDbContext is not creating other tables, only the identity tables
body: <p>I'm using Add-Migration Initial to create the databases but it only creates the Identity tables and don't create the table Categoria. Any ideas what am i doing wrong ? </p>
  
  <pre><code>using Ecommerce.Core;
  using Ecommerce.Core.Domain.Categorias;
  using Ecommerce.Core.Domain.Roles;
  using Ecommerce.Core.Domain.Usuarios;
  using Ecommerce.Data.ModelExtensions;
  using Microsoft.AspNetCore.Identity.EntityFrameworkCore;
  using Microsoft.EntityFrameworkCore;
  
  namespace Ecommerce.Data
  {
      public class EcommerceContext : IdentityDbContext&lt;Usuario, Role, int&gt;
      {
          public EcommerceContext(DbContextOptions&lt;EcommerceContext&gt; options) : base(options) { }
  
          protected override void OnModelCreating(ModelBuilder builder)
          {
              base.OnModelCreating(builder);
              //builder.AddEntityConfigurationsFromAssembly(GetType().Assembly);
              builder.Entity&lt;Categoria&gt;(c =&gt;
              {
                  c.ToTable("Categoria");
                  c.HasKey(i =&gt; i.Id);
                  c.Property(i =&gt; i.Nome);
                  c.Property(i =&gt; i.dataCadastro);
              });
          }
  
          public DbSet&lt;Categoria&gt; Categoria { get; set; }
      }
  }
  </code></pre>