feat: Add organization option to auth0 auth provider

Signed-off-by: Jack Palmer <jackpalmer@spotify.com>

plugins/auth-backend-module-auth0-provider/config.d.ts

@@ -32,6 +32,7 @@ export interface Config {
           audience?: string;
           connection?: string;
           connectionScope?: string;
+          organization?: string;
           sessionDuration?: HumanDuration | string;
         };
       };

plugins/auth-backend-module-auth0-provider/package.json

@@ -37,6 +37,7 @@
     "@backstage/backend-plugin-api": "workspace:^",
     "@backstage/plugin-auth-node": "workspace:^",
     "express": "^4.22.0",
+    "passport": "^0.7.0",
     "passport-auth0": "^1.4.3",
     "passport-oauth2": "^1.6.1"
   },
@@ -46,6 +47,7 @@
     "@backstage/cli": "workspace:^",
     "@backstage/plugin-auth-backend": "workspace:^",
     "@backstage/types": "workspace:^",
+    "@types/passport": "^1.0.3",
     "@types/passport-auth0": "^1.0.5",
     "@types/passport-oauth2": "^1.4.15",
     "supertest": "^7.0.0"

plugins/auth-backend-module-auth0-provider/src/authenticator.ts

@@ -35,6 +35,7 @@ export const auth0Authenticator = createOAuthAuthenticator({
     const connection = config.getOptionalString('connection');
     const connectionScope = config.getOptionalString('connectionScope');
     const callbackURL = config.getOptionalString('callbackUrl') ?? callbackUrl;
+    const organization = config.getOptionalString('organization');
     // Due to passport-auth0 forcing options.state = true,
     // passport-oauth2 requires express-session to be installed
     // so that the 'state' parameter of the oauth2 flow can be stored.
@@ -58,6 +59,7 @@ export const auth0Authenticator = createOAuthAuthenticator({
           callbackURL,
           domain,
           store,
+          organization,
           // We need passReqToCallback set to false to get params, but there's
           // no matching type signature for that, so instead behold this beauty
           passReqToCallback: false as true,

plugins/auth-backend-module-auth0-provider/src/strategy.ts

@@ -25,10 +25,13 @@ export interface Auth0StrategyOptionsWithRequest {
   domain: string;
   passReqToCallback: true;
   store: StateStore;
+  organization?: string;
 }
 
 /** @public */
 export class Auth0Strategy extends Auth0InternalStrategy {
+  private organization: string | undefined;
+
   constructor(
     options: Auth0StrategyOptionsWithRequest,
     verify: Auth0InternalStrategy.VerifyFunction,
@@ -41,5 +44,18 @@ export class Auth0Strategy extends Auth0InternalStrategy {
       apiUrl: `https://${options.domain}/api`,
     };
     super(optionsWithURLs, verify);
+    this.organization = options.organization;
+  }
+
+  authorizationParams(options: Record<string, any>): Record<string, any> {
+    const params = super.authorizationParams(options);
+
+    if (this.organization) {
+      return {
+        ...params,
+        organization: this.organization,
+      };
+    }
+    return params;
   }
 }

plugins/auth-backend-module-auth0-provider/src/types.d.ts

@@ -0,0 +1,100 @@
+/*
+ * Copyright 2026 The Backstage Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+declare module 'passport-auth0' {
+  import passport from 'passport';
+  import express from 'express';
+
+  declare class StrategyInternal extends passport.Strategy {
+    constructor(
+      options: StrategyInternal.StrategyOptionWithRequest,
+      verify: StrategyInternal.VerifyFunctionWithRequest,
+    );
+    constructor(
+      options: StrategyInternal.StrategyOption,
+      verify: StrategyInternal.VerifyFunction,
+    );
+
+    name: string;
+    authenticate(req: express.Request, options?: object): void;
+    authorizationParams(options: Record<string, any>): Record<string, any>;
+  }
+
+  declare namespace StrategyInternal {
+    interface Profile extends passport.Profile {
+      id: string;
+      displayName: string;
+      gender?: string | undefined;
+      ageRange?:
+        | {
+            min: number;
+            max?: number | undefined;
+          }
+        | undefined;
+      profileUrl?: string | undefined;
+      username?: string | undefined;
+      birthday: string;
+
+      _raw: string;
+      _json: any;
+    }
+
+    interface AuthenticateOptions extends passport.AuthenticateOptions {
+      authType?: string | undefined;
+    }
+
+    interface StrategyOption {
+      clientID: string;
+      clientSecret: string;
+      callbackURL: string;
+      domain: string;
+      scopeSeparator?: string | undefined;
+      enableProof?: boolean | undefined;
+      profileFields?: string[] | undefined;
+      state?: boolean | undefined;
+    }
+
+    interface StrategyOptionWithRequest extends StrategyOption {
+      passReqToCallback: true;
+    }
+    interface ExtraVerificationParams {
+      audience?: string | undefined;
+      connection?: string | undefined;
+      prompt?: string | undefined;
+    }
+
+    type VerifyFunction = (
+      accessToken: string,
+      refreshToken: string,
+      extraParams: ExtraVerificationParams,
+      profile: Profile,
+      done: (error: any, user?: any, info?: any) => void,
+    ) => void;
+
+    type VerifyFunctionWithRequest = (
+      req: express.Request,
+      accessToken: string,
+      refreshToken: string,
+      extraParams: ExtraVerificationParams,
+      profile: Profile,
+      done: (error: any, user?: any, info?: any) => void,
+    ) => void;
+
+    export import Strategy = StrategyInternal;
+  }
+
+  export = StrategyInternal;
+}

yarn.lock

@@ -4283,9 +4283,11 @@ __metadata:
     "@backstage/plugin-auth-backend": "workspace:^"
     "@backstage/plugin-auth-node": "workspace:^"
     "@backstage/types": "workspace:^"
+    "@types/passport": "npm:^1.0.3"
     "@types/passport-auth0": "npm:^1.0.5"
     "@types/passport-oauth2": "npm:^1.4.15"
     express: "npm:^4.22.0"
+    passport: "npm:^0.7.0"
     passport-auth0: "npm:^1.4.3"
     passport-oauth2: "npm:^1.6.1"
     supertest: "npm:^7.0.0"