Remove unused test and fix import formatting

Deleted test_to_a2a_auth_switch.py as it is no longer needed. Fixed import formatting in several files for consistency by removing extra spaces. Also removed an unused import in identity_client.py.

Author: loveyana

test_to_a2a_auth_switch.py

@@ -26,7 +26,7 @@
 from google.adk.auth.auth_tool import AuthConfig
 from google.adk.agents.callback_context import CallbackContext
 
-from veadk.auth.ve_credential_service  import VeCredentialService
+from veadk.auth.ve_credential_service import VeCredentialService
 
 
 @pytest.fixture

tests/auth/test_credential_service.py

@@ -21,7 +21,7 @@
 from starlette.responses import Response
 
 from veadk.a2a.ve_middlewares import A2AAuthMiddleware, build_a2a_auth_middleware
-from veadk.auth.ve_credential_service  import VeCredentialService
+from veadk.auth.ve_credential_service import VeCredentialService
 from veadk.utils.auth import VE_TIP_TOKEN_HEADER
 
 

tests/test_ve_a2a_middlewares.py

@@ -116,7 +116,7 @@ def to_a2a(
         ```
     """
     app_name = agent.name or DEFAULT_AGENT_NAME
-    middleware = None # May need support multiple middlewares in the future
+    middleware = None  # May need support multiple middlewares in the future
 
     # Handle VeADK authentication setup
     if enable_auth:

veadk/a2a/utils/agent_to_a2a.py

@@ -27,7 +27,7 @@
 from volcenginesdkcore.rest import ApiException
 
 
-from veadk.auth.ve_credential_service  import VeCredentialService
+from veadk.auth.ve_credential_service import VeCredentialService
 from veadk.utils.auth import (
     extract_delegation_chain_from_jwt,
     build_auth_config,

veadk/a2a/ve_middlewares.py

@@ -27,7 +27,6 @@
 import volcenginesdkid
 import volcenginesdkcore
 import volcenginesdksts
-from volcenginesdkcore.rest import ApiException
 
 from veadk.consts import VEFAAS_IAM_CRIDENTIAL_PATH
 from veadk.integrations.ve_identity.models import (