'No database provider has been configured for this DbContext' on SignInManager.PasswordSignInAsync

Question

.Net Core 1.0.0 - SDK Preview 2 (x64)

.Net Core 1.0.0 - VS "15" Preview 2 (x64)

.Net Core 1.0.0 - Runtime (x64)

So,

Answer 1

This is the solution i found.

https://github.com/aspnet/EntityFramework.Docs/blob/master/entity-framework/core/miscellaneous/configuring-dbcontext.md

Configure DBContext via AddDbContext

public void ConfigureServices(IServiceCollection services)
{
    services.AddDbContext(options => options.UseSqlite("Data Source=blog.db"));
}

Add new constructor to your DBContext class

public class BloggingContext : DbContext
{
    public BloggingContext(DbContextOptions options)
      :base(options)
    { }

    public DbSet Blogs { get; set; }
}

Inject context to your controllers

public class MyController
{
    private readonly BloggingContext _context;

    public MyController(BloggingContext context)
    {
      _context = context;
    }

    ...
}