Update main.py

Author: jtcorbett

src/mcp_agent/cli/auth/main.py

@@ -19,10 +19,9 @@ def save_credentials(credentials: UserCredentials) -> None:
     os.makedirs(os.path.dirname(credentials_path), exist_ok=True)
 
     # Create file with restricted permissions (0600) to prevent leakage
-    with open(credentials_path, "w", encoding="utf-8") as f:
-        fd = os.open(credentials_path, os.O_WRONLY | os.O_CREAT, 0o600)
-        with os.fdopen(fd, "w") as f:
-            f.write(credentials.to_json())
+    fd = os.open(credentials_path, os.O_WRONLY | os.O_CREAT, 0o600)
+    with os.fdopen(fd, "w") as f:
+        f.write(credentials.to_json())
 
 
 def load_credentials() -> Optional[UserCredentials]: