[next] SSO Refactor (#1912)

* feat: support dual sso/jwt auth

* feat: move verifier logic to seperate strategy

* fix: adjusted tests and removed aud claim

* fix: cleanup

src/types/jsonwebtoken.d.ts

@@ -15,5 +15,5 @@ declare module "jsonwebtoken" {
     secretOrPublicKey: string | Buffer | KeyFunction,
     options?: VerifyOptions,
     callback?: VerifyCallback
-  ): void;
+  ): object | string;
 }