diff --git a/service/banking/core_banking_routes.py b/service/banking/core_banking_routes.py
index 8d1eb33..499fc24 100644
--- a/service/banking/core_banking_routes.py
+++ b/service/banking/core_banking_routes.py
@@ -42,22 +42,22 @@ class PaymentRequest(BaseModel):
     category: Optional[str] = None
     otp: Optional[str] = None
 
-def format_contact_details(contacts, limit=None):
-    """Helper function to format contact details for error messages"""
-    details = []
-    for b in contacts:
-        identifier = f"'{b.name}'"
-        if b.nickname:
-            identifier += f" (nickname: {b.nickname})"
-        if b.tag:
-            identifier += f" (tag: {b.tag})"
-        details.append(identifier)
+# def format_contact_details(contacts, limit=None):     #not used elsewhere
+#     """Helper function to format contact details for error messages"""
+#     details = []
+#     for b in contacts:
+#         identifier = f"'{b.name}'"
+#         if b.nickname:
+#             identifier += f" (nickname: {b.nickname})"
+#         if b.tag:
+#             identifier += f" (tag: {b.tag})"
+#         details.append(identifier)
     
-    if limit and len(details) > limit:
-        displayed = details[:limit]
-        more_count = len(details) - limit
-        return f"{', '.join(displayed)} and {more_count} more"
-    return ', '.join(details)
+#     if limit and len(details) > limit:
+#         displayed = details[:limit]
+#         more_count = len(details) - limit
+#         return f"{', '.join(displayed)} and {more_count} more"
+#     return ', '.join(details)
 
 def find_beneficiary(db: Session, customer_id: int, to: str):
     """Find a beneficiary by name, nickname, or tag with smart conflict handling."""
@@ -433,7 +433,7 @@ async def search_txn(
     return {"transactions": db_transactions}
 
 @router.get("/beneficiaries")
-def get_beneficiaries(
+def get_beneficiaries(  
     customer_id: int = None,
     phone: str = None,
     db: Session = Depends(get_db)
diff --git a/service/drive.py b/service/drive.py
index 4cf5aed..4f63f4d 100644
--- a/service/drive.py
+++ b/service/drive.py
@@ -34,23 +34,23 @@ def get_credentials():
         os.getenv("SERVICE_ACCOUNT_FILE"), scopes=SCOPES)
     return credentials
 
-def user_account_creds():
-    '''Get user account credentials'''
-    creds = None
-    if os.path.exists("token.json"):
-        creds = Credentials.from_authorized_user_file("token.json", SCOPES)
-    if not creds or not creds.valid:
-        if creds and creds.expired and creds.refresh_token:
-            creds.refresh(Request())
-        else:
-            flow = InstalledAppFlow.from_client_secrets_file(
-                os.getenv("GOOGLE_ACCOUNT_FILE"),
-                SCOPES
-            )
-            creds = flow.run_local_server(port=0)
-        with open("token.json", "w") as token:
-            token.write(creds.to_json())
-    return creds
+# def user_account_creds():  # not used in service package
+#     '''Get user account credentials'''
+#     creds = None
+#     if os.path.exists("token.json"):
+#         creds = Credentials.from_authorized_user_file("token.json", SCOPES)
+#     if not creds or not creds.valid:
+#         if creds and creds.expired and creds.refresh_token:
+#             creds.refresh(Request())
+#         else:
+#             flow = InstalledAppFlow.from_client_secrets_file(
+#                 os.getenv("GOOGLE_ACCOUNT_FILE"),
+#                 SCOPES
+#             )
+#             creds = flow.run_local_server(port=0)
+#         with open("token.json", "w") as token:
+#             token.write(creds.to_json())
+#     return creds
     
 def get_folder_id(service, folder_name):
     """Get the ID of a folder by name."""
@@ -222,4 +222,4 @@ def main():
 
 
 if __name__ == "__main__":
-    files = main()
+    files = main()  #not imported/used elsewhere (ask if it used in any script)
diff --git a/service/main.py b/service/main.py
index f11c046..43323da 100644
--- a/service/main.py
+++ b/service/main.py
@@ -50,7 +50,7 @@ def generate_timestamp_json(translation, summary, detected_language=None):
     }
 
 @api_version(1)
-@app.post("/upload-audio")
+@app.post("/upload-audio")    #2 definations of upload_audio , we can keep the latest version or which is getting used and remove another
 async def upload_audio(body: Body):
     try:
         if body.audio_file_link == "":
diff --git a/service/surv.py b/service/surv.py
index f46b64b..741ae87 100644
--- a/service/surv.py
+++ b/service/surv.py
@@ -2,7 +2,7 @@
 
 
 #SARVAM_API_KEY="sk_lz33toms_amJdXnvyWxlBQIs4OPue1yexi"
-SARVAM_API_KEY="sk_t7fvsjjb_7JsD5ZXGrEhHqjUtAQSFsCxB"
+SARVAM_API_KEY="sk_t7fvsjjb_7JsD5ZXGrEhHqjUtAQSFsCxB"  #should not harcode an API key in code
 client = SarvamAI(
     api_subscription_key=SARVAM_API_KEY,
 )
diff --git a/service/util.py b/service/util.py
index b0e3e27..3b8a908 100644
--- a/service/util.py
+++ b/service/util.py
@@ -1,6 +1,6 @@
 import json
 
-def generate_timestamp_json(translation,summary,detected_language):
+def generate_timestamp_json(translation,summary,detected_language): #same name function is used in main.py , can we write logic in such a way that only one function used everywhere
     segs = []
     seg = {}
     segments = translation["segments"]