diff --git a/supabase_auth/_sync/api.py b/supabase_auth/_sync/api.py
index 24dc1a8d..35bbb69b 100644
--- a/supabase_auth/_sync/api.py
+++ b/supabase_auth/_sync/api.py
@@ -136,8 +136,8 @@ def sign_up_with_email(
         data = {"email": email, "password": password, "data": data}
         url = f"{self.url}/signup{query_string}"
         response = self.http_client.post(url, json=data, headers=headers)
-        SessionOrUserModel = determine_session_or_user_model_from_response(response)
-        return SessionOrUserModel.parse_response(response)
+        session_or_user_model = determine_session_or_user_model_from_response(response)
+        return session_or_user_model.parse_response(response)
 
     def sign_in_with_email(
         self,
@@ -211,8 +211,8 @@ def sign_up_with_phone(
         data = {"phone": phone, "password": password, "data": data}
         url = f"{self.url}/signup"
         response = self.http_client.post(url, json=data, headers=headers)
-        SessionOrUserModel = determine_session_or_user_model_from_response(response)
-        return SessionOrUserModel.parse_response(response)
+        session_or_user_model = determine_session_or_user_model_from_response(response)
+        return session_or_user_model.parse_response(response)
 
     def sign_in_with_phone(
         self,
@@ -335,8 +335,8 @@ def verify_mobile_otp(
             data["redirect_to"] = redirect_to_encoded
         url = f"{self.url}/verify"
         response = self.http_client.post(url, json=data, headers=headers)
-        SessionOrUserModel = determine_session_or_user_model_from_response(response)
-        return SessionOrUserModel.parse_response(response)
+        session_or_user_model = determine_session_or_user_model_from_response(response)
+        return session_or_user_model.parse_response(response)
 
     def invite_user_by_email(
         self,
@@ -637,8 +637,8 @@ def generate_link(
             data["redirect_to"] = redirect_to_encoded
         url = f"{self.url}/admin/generate_link"
         response = self.http_client.post(url, json=data, headers=headers)
-        SessionOrUserModel = determine_session_or_user_model_from_response(response)
-        return SessionOrUserModel.parse_response(response)
+        session_or_user_model = determine_session_or_user_model_from_response(response)
+        return session_or_user_model.parse_response(response)
 
     def set_auth_cookie(self, *, req, res):
         """Stub for parity with JS api."""
diff --git a/supabase_auth/helpers.py b/supabase_auth/helpers.py
index 0c9a0613..a5d7ceb2 100644
--- a/supabase_auth/helpers.py
+++ b/supabase_auth/helpers.py
@@ -133,11 +133,11 @@ def decode_jwt_payload(token: str) -> Any:
     parts = token.split(".")
     if len(parts) != 3:
         raise ValueError("JWT is not valid: not a JWT structure")
-    base64Url = parts[1]
+    base64url = parts[1]
     # Addding padding otherwise the following error happens:
     # binascii.Error: Incorrect padding
-    base64UrlWithPadding = base64Url + "=" * (-len(base64Url) % 4)
-    return loads(urlsafe_b64decode(base64UrlWithPadding).decode("utf-8"))
+    base64url_with_padding = base64url + "=" * (-len(base64url) % 4)
+    return loads(urlsafe_b64decode(base64url_with_padding).decode("utf-8"))
 
 
 def generate_pkce_verifier(length=64):