From 764809753ad85ecc209aa9b126efbb3390c03274 Mon Sep 17 00:00:00 2001
From: Gaurav <39389231+gsquared94@users.noreply.github.com>
Date: Fri, 11 Jul 2025 14:08:49 -0700
Subject: fix: `TypeError: Cannot read properties of undefined (reading
 'authType')` (#3914)

---
 packages/core/src/core/geminiChat.ts |  4 ++--
 packages/core/src/telemetry/types.ts | 12 ++++++------
 2 files changed, 8 insertions(+), 8 deletions(-)

(limited to 'packages/core/src')

diff --git a/packages/core/src/core/geminiChat.ts b/packages/core/src/core/geminiChat.ts
index ab4f602c..f93470dd 100644
--- a/packages/core/src/core/geminiChat.ts
+++ b/packages/core/src/core/geminiChat.ts
@@ -172,7 +172,7 @@ export class GeminiChat {
         this.config.getModel(),
         durationMs,
         prompt_id,
-        this.config.getContentGeneratorConfig().authType!,
+        this.config.getContentGeneratorConfig()?.authType,
         usageMetadata,
         responseText,
       ),
@@ -194,7 +194,7 @@ export class GeminiChat {
         errorMessage,
         durationMs,
         prompt_id,
-        this.config.getContentGeneratorConfig().authType!,
+        this.config.getContentGeneratorConfig()?.authType,
         errorType,
       ),
     );
diff --git a/packages/core/src/telemetry/types.ts b/packages/core/src/telemetry/types.ts
index 9f6e1462..9ac12050 100644
--- a/packages/core/src/telemetry/types.ts
+++ b/packages/core/src/telemetry/types.ts
@@ -96,13 +96,13 @@ export class UserPromptEvent {
   'event.timestamp': string; // ISO 8601
   prompt_length: number;
   prompt_id: string;
-  auth_type: string;
+  auth_type?: string;
   prompt?: string;
 
   constructor(
     prompt_length: number,
     prompt_Id: string,
-    auth_type: string,
+    auth_type?: string,
     prompt?: string,
   ) {
     this['event.name'] = 'user_prompt';
@@ -167,14 +167,14 @@ export class ApiErrorEvent {
   status_code?: number | string;
   duration_ms: number;
   prompt_id: string;
-  auth_type: string;
+  auth_type?: string;
 
   constructor(
     model: string,
     error: string,
     duration_ms: number,
     prompt_id: string,
-    auth_type: string,
+    auth_type?: string,
     error_type?: string,
     status_code?: number | string,
   ) {
@@ -205,13 +205,13 @@ export class ApiResponseEvent {
   total_token_count: number;
   response_text?: string;
   prompt_id: string;
-  auth_type: string;
+  auth_type?: string;
 
   constructor(
     model: string,
     duration_ms: number,
     prompt_id: string,
-    auth_type: string,
+    auth_type?: string,
     usage_data?: GenerateContentResponseUsageMetadata,
     response_text?: string,
     error?: string,
-- 
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