E:\soccer\pull_api_football.py:189: FutureWarning: The behavior of DataFrame concatenation with empty or all-NA entries is deprecated. In a future version, this will no longer exclude empty or all-NA columns when determining the result dtypes. To retain the old behavior, exclude the relevant entries before the concat operation.
  combined = pd.concat([existing, chunk], ignore_index=True) if len(existing) else chunk