Add NO_BROWSER environment variable to trigger offline oauth flow (#3713)

packages/core/src/core/client.ts

@@ -109,6 +109,7 @@ export class GeminiClient {
   async initialize(contentGeneratorConfig: ContentGeneratorConfig) {
     this.contentGenerator = await createContentGenerator(
       contentGeneratorConfig,
+      this.config,
       this.config.getSessionId(),
     );
     this.chat = await this.startChat();