auth-backend: add okta missing common resolvers

Signed-off-by: Vincenzo Scamporlino <vincenzos@spotify.com>

plugins/auth-backend/api-report.md

@@ -592,6 +592,8 @@ export const providers: Readonly<{
         | undefined,
     ) => AuthProviderFactory_2;
     resolvers: Readonly<{
+      emailLocalPartMatchingUserEntityName: () => SignInResolver<unknown>;
+      emailMatchingUserEntityProfileEmail: () => SignInResolver<unknown>;
       emailMatchingUserEntityAnnotation(): SignInResolver<OAuthResult>;
     }>;
   }>;

plugins/auth-backend/src/providers/okta/provider.ts

@@ -24,6 +24,10 @@ import {
   adaptLegacyOAuthSignInResolver,
 } from '../../lib/legacy';
 import { oktaAuthenticator } from '@backstage/plugin-auth-backend-module-okta-provider';
+import {
+  commonByEmailLocalPartResolver,
+  commonByEmailResolver,
+} from '../resolvers';
 
 /**
  * Auth provider integration for Okta auth
@@ -51,6 +55,17 @@ export const okta = createAuthProviderIntegration({
     });
   },
   resolvers: {
+    /**
+     * Looks up the user by matching their email local part to the entity name.
+     */
+    emailLocalPartMatchingUserEntityName: () => commonByEmailLocalPartResolver,
+    /**
+     * Looks up the user by matching their email to the entity email.
+     */
+    emailMatchingUserEntityProfileEmail: () => commonByEmailResolver,
+    /**
+     * Looks up the user by matching their email to the `okta.com/email` annotation.
+     */
     emailMatchingUserEntityAnnotation(): SignInResolver<OAuthResult> {
       return async (info, ctx) => {
         const { profile } = info;