fix: use quota_project_id field instead of quota_project (#832)

src/auth/credentials.ts

@@ -37,7 +37,7 @@ export interface JWTInput {
   client_id?: string;
   client_secret?: string;
   refresh_token?: string;
-  quota_project?: string;
+  quota_project_id?: string;
 }
 
 export interface CredentialBody {

src/auth/jwtclient.ts

@@ -265,7 +265,7 @@ export class JWT extends OAuth2Client {
     this.key = json.private_key;
     this.keyId = json.private_key_id;
     this.projectId = json.project_id;
-    this.quotaProject = json.quota_project;
+    this.quotaProjectId = json.quota_project_id;
   }
 
   /**

src/auth/oauth2client.ts

@@ -365,7 +365,7 @@ export class OAuth2Client extends AuthClient {
   private certificateCache: Certificates = {};
   private certificateExpiry: Date | null = null;
   private certificateCacheFormat: CertificateFormat = CertificateFormat.PEM;
-  protected quotaProject?: string;
+  protected quotaProjectId?: string;
   protected refreshTokenPromises = new Map<string, Promise<GetTokenResponse>>();
 
   // TODO: refactor tests to make this private
@@ -742,14 +742,14 @@ export class OAuth2Client extends AuthClient {
    */
   async getRequestHeaders(url?: string): Promise<Headers> {
     const headers = (await this.getRequestMetadataAsync(url)).headers;
-    // quota_project, stored in application_default_credentials.json, is set in
+    // quota_project_id, stored in application_default_credentials.json, is set in
     // the x-goog-user-project header, to indicate an alternate account for
     // billing and quota:
     if (
       !headers['x-goog-user-project'] && // don't override a value the user sets.
-      this.quotaProject
+      this.quotaProjectId
     ) {
-      headers['x-goog-user-project'] = this.quotaProject;
+      headers['x-goog-user-project'] = this.quotaProjectId;
     }
     return headers;
   }

src/auth/refreshclient.ts

@@ -115,7 +115,7 @@ export class UserRefreshClient extends OAuth2Client {
     this._clientSecret = json.client_secret;
     this._refreshToken = json.refresh_token;
     this.credentials.refresh_token = json.refresh_token;
-    this.quotaProject = json.quota_project;
+    this.quotaProjectId = json.quota_project_id;
   }
 
   /**

test/fixtures/config-with-quota/.config/gcloud/application_default_credentials.json

@@ -4,5 +4,5 @@
   "refresh_token": "refreshtoken",
   "type": "authorized_user",
   "project_id": "my-project",
-  "quota_project": "my-quota-project"
+  "quota_project_id": "my-quota-project"
 }

test/test.refresh.ts

@@ -123,7 +123,7 @@ it('fromStream should read the stream and create a UserRefreshClient', done => {
   });
 });
 
-it('getRequestHeaders should populate x-goog-user-project header if quota_project present', async () => {
+it('getRequestHeaders should populate x-goog-user-project header if quota_project_id present', async () => {
   // The first time auth.getRequestHeaders() is called /token endpoint is used to
   // fetch a JWT.
   const req = nock('https://oauth2.googleapis.com')