remove redundant storage of installationsAuthId

Author: DellaBitta

common/api-review/app.api.md

@@ -73,9 +73,6 @@ export interface FirebaseOptions {
 
 // @public
 export interface FirebaseServerApp extends FirebaseApp {
-    // (undocumented)
-    readonly installationsAuthToken: string | null;
-    // (undocumented)
     readonly installationsId: string | null;
     name: string;
     readonly settings: FirebaseServerAppSettings;

packages/app/src/firebaseServerApp.ts

@@ -144,15 +144,6 @@ export class FirebaseServerAppImpl
     return this._serverConfig;
   }
 
-  get installationsAuthToken(): string | null {
-    this.checkDestroyed();
-    if (this._serverConfig.installationsAuthToken !== undefined) {
-      return this._serverConfig.installationsAuthToken;
-    } else {
-      return null;
-    }
-  }
-
   get installationsId(): string | null {
     this.checkDestroyed();
     return this._installationsId;

packages/app/src/public-types.ts

@@ -101,8 +101,11 @@ export interface FirebaseServerApp extends FirebaseApp {
    */
   readonly settings: FirebaseServerAppSettings;
 
+  /**
+   * The parsed Firebase Installations Id token if a `installationsAuthToken` was provided to
+   * {@link (initializeServerApp:1) | initializeServerApp()}. Null otherwise.
+   */
   readonly installationsId: string | null;
-  readonly installationsAuthToken: string | null;
 }
 
 /**

packages/installations/src/api/get-token.ts

@@ -35,12 +35,12 @@ export async function getToken(
   forceRefresh = false
 ): Promise<string> {
   if (_isFirebaseServerApp(installations.app)) {
-    if (!installations.app.installationsAuthToken) {
+    if (!installations.app.settings.installationsAuthToken) {
       throw ERROR_FACTORY.create(
         ErrorCode.SERVER_APP_MISSING_INSTALLATIONS_AUTH_TOKEN
       );
     }
-    return installations.app.installationsAuthToken;
+    return installations.app.settings.installationsAuthToken;
   }
   const installationsImpl = installations as FirebaseInstallationsImpl;
   await completeInstallationRegistration(installationsImpl);