openiddict-core | versatile OAuth 2.0/OpenID Connect stack | OAuth library

I am using Openidict.
I am trying to return custom message with custom status code, but I am unable to do it. My configuration in startup.cs:

I'm trying out OpenIddict 3.0 for use in a SSO app. I followed the steps in the documentation, created an Authorize controller, and added a test application. When I try to connect to authorize I get this exception:

System.InvalidOperationException: The authorization request was not handled. To handle authorization requests, create a class implementing 'IOpenIddictServerHandler' and register it using 'services.AddOpenIddict().AddServer().AddEventHandler()'.
Alternatively, enable the pass-through mode to handle them at a later stage.

I can't find anything in the documentation or sample apps that explains what this means. What am I missing?

Here's my code so far. In Startup.cs:

So, I'm trying to implement OpenIddict version 1.0.0-beta2-0580 with NET core 1.1 and I get the following error:

An unhandled exception occurred while processing the request

This is based on this : https://github.com/openiddict/openiddict-core/tree/dev/samples

The db registers the database correctly, the settings is loaded and everything works here. The tables in the db: __efmigrationshistory, aspnetroleclaims, aspnetroles, aspnetuserclaims, aspnetuserlogins, aspnetuserroles, aspnetusers, aspnetusertokens, basetransaction, openiddictapplications, openiddictauthorizations, openiddictscopes, openiddicttokens

And then I have the following stack trace :

I stumbled upon OpenIddict and after going through a few example server code, I could not find what I was looking for. I was hoping to see an example of OpenIddict using auth code flow with PKCE, since that seems to be the recommended approach toward security now, but could not find one using both explicitly. My app is a ASP.NET Core WebAPI based app, with a React client. Any help or guidance would be appreciated.

I am following the exact example from the OpenIddict example here: https://github.com/openiddict/openiddict-core. Everything works until I use the AddIdentity portion. I really need to use Identity. Commenting out the Identity portion will work, if it is uncommented then I get a 404 on the Get method in the test controller because it will not authorize. I am using .Net Core 2.x

Startup.cs:

How can I set default scheme for Openiddict-core tables?

Unfortunately EF Core does't have (not that I know) a method that would accept only scheme and (EntityTypeBuilder.ToTable) requires also table name, beside scheme.

I am trying to customize the OpenIddictApplication table and i am succeeded about that.

My problem is that when i try to generate token i got the following error "Cannot create a DbSet for 'OpenIddictApplication' because this type is not included in the model for the context".

Here is my service configuration:

I'm migrating from .NET Core 1.1 to 2.0, and now I have to update my Authentication too.

I'm using OAuth and OpenIddict to .NET Core 2.0

When I'm sending the request to my connect/token I'm getting this:

OpenIddict.Server.OpenIddictServerHandler[0] The token response was successfully returned: {

"error": "unsupported_grant_type",

"error_description": "The specified 'grant_type' parameter is not supported."

}.

This is my request method:

I have web api which uses jwt bearer authentication. The implementation (openiddict) which creates the jwt uses the the current url as issuer.