Test:Fix ut error

Author: pragya811

.github/workflows/PR_Approval.yml

@@ -34,4 +34,9 @@ jobs:
           flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
           flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
       - name: Unittest with pytest
+        env:
+            # Dummy credentials so boto3 doesn't fail during test collection
+            AWS_ACCESS_KEY_ID: 'test_key'
+            AWS_SECRET_ACCESS_KEY: 'test_secret'
+            AWS_DEFAULT_REGION: 'us-east-2'
         run: python -m pytest -v tests/unittest