Adjust UseUserAccessGroup integration test per review

The test now calls UseUserAccessGroup without checking its return value.
This is to prevent failures in environments where keychain sharing might not be configured, as the primary goal of this test is to ensure the method call itself doesn't crash on iOS.

Author: google-labs-jules[bot]

auth/integration_test/src/integration_test.cc

@@ -1516,14 +1516,14 @@ TEST_F(FirebaseAuthTest, TestLinkFederatedProviderBadProviderIdFails) {
 #if TARGET_OS_IPHONE
 TEST_F(FirebaseAuthTest, TestUseUserAccessGroup) {
   // This is a simple smoke test to ensure the method can be called
-  // without crashing on iOS and returns the expected default success.
+  // without crashing on iOS.
   // Deeper testing of keychain access group functionality would require
   // more complex setup and is typically done manually or with UI tests.
-  EXPECT_EQ(auth_->UseUserAccessGroup(nullptr),
-            firebase::auth::kAuthErrorNone);
-  EXPECT_EQ(auth_->UseUserAccessGroup("test-group"),
-            firebase::auth::kAuthErrorNone);
-  EXPECT_EQ(auth_->UseUserAccessGroup(""), firebase::auth::kAuthErrorNone);
+  // We don't check the return value as keychain sharing may not be configured,
+  // leading to legitimate errors.
+  auth_->UseUserAccessGroup(nullptr);
+  auth_->UseUserAccessGroup("test-group");
+  auth_->UseUserAccessGroup("");
 }
 #endif  // TARGET_OS_IPHONE