Typescript errors when using customer provider

[bhaskarmurthy]

Describe the bug
I'm getting a type error when passing a custom Provider to the NextAuth method.

Error 1
When passing an id to the provider config, there's an error about Type 'string' is not assignable to type 'undefined'.

Error 2
However, if I don't set the id property, I get a different error about Object literal may only specify known properties, and 'protection' does not exist in type 'Provider<undefined, "oauth">'

Error 3
I'm also getting another type error if for domain if I set the Provider type using the template:
const customProvider: Provider<'custom'> = {...}

Error:
Property 'domain' is missing in type 'Provider<"custom", "oauth">' but required in type '{ domain: string; }'

import NextAuth from "next-auth";
import { Provider } from "next-auth/providers";

const customProvider: Provider = {
  // required
  id: "custom",
  name: "Custom Provider",
  type: "oauth",
  version: "2.0",
  accessTokenUrl: process.env.OAUTH_TOKEN_URL,
  authorizationUrl: `${process.env.OAUTH_AUTHORIZE_URL}?response_type=code`,
  clientId: process.env.OAUTH_CLIENT_ID,
  // optional
  params: { grant_type: "authorization_code" },
  protection: ["pkce", "state"],
};

export default NextAuth({
  providers: [customProvider],
  // debug: true,
});

Steps to reproduce
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Expected behavior
If I set the id to be a string constant using the Provider<'custom'> type, I should be able to set the protection optional value (as per the docs)

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Additional context
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Feedback
Documentation refers to searching through online documentation, code comments and issue history. The example project refers to next-auth-example.

• Found the documentation helpful
• Found documentation but was incomplete
• Could not find relevant documentation
• Found the example project helpful
• Did not find the example project helpful

[balazsorban44]

a big rewrite and built-in types are coming soon, watch out for

#1690

it will first be merged to beta, then soon after to main.

hopefully that should address all your problems.

if not, feel free to repoen this.