diff --git a/livekit-api/livekit/api/access_token.py b/livekit-api/livekit/api/access_token.py
index f8b6fa22..48622f71 100644
--- a/livekit-api/livekit/api/access_token.py
+++ b/livekit-api/livekit/api/access_token.py
@@ -164,9 +164,9 @@ def verify(self, token: str) -> Claims:
         return c
 
 
-def camel_to_snake(str):
-    return re.sub(r"(?<!^)(?=[A-Z])", "_", str).lower()
+def camel_to_snake(t: str):
+    return re.sub(r"(?<!^)(?=[A-Z])", "_", t).lower()
 
 
-def snake_to_camel(str):
-    return "".join(word.title() for word in name.split("_"))
+def snake_to_camel(t: str):
+    return "".join(x.title() for x in t.split("_"))
diff --git a/livekit-api/livekit/api/webhook.py b/livekit-api/livekit/api/webhook.py
index 28ffa6ea..23565b22 100644
--- a/livekit-api/livekit/api/webhook.py
+++ b/livekit-api/livekit/api/webhook.py
@@ -6,11 +6,11 @@
 
 
 class WebhookReceiver:
-    def __init__(token_verifier: TokenVerifier):
-        self.token_verifier = token_verifier
+    def __init__(self, token_verifier: TokenVerifier):
+        self._verifier = token_verifier
 
     def receive(self, body: str, auth_token: str):
-        claims = self.token_verifier.verify(auth_token)
+        claims = self._verifier.verify(auth_token)
 
         body_hash = hashlib.sha256(body).digest()
         claims_hash = base64.b64decode(claims.sha256)