When constructing connection strings/URIs that embed user credentials, always URL-encode username/password (and other URI components as needed) using an encoder that safely handles reserved characters. Avoid urllib.parse.quote for credentials where characters like @ and # may appear; prefer quote_plus.

Example:

from urllib.parse import quote_plus

db_url = (
    f"doris://{quote_plus(user)}:{quote_plus(pwd)}@{host}:{port}/{db_name}"
)

This prevents malformed URIs and ensures credentials are interpreted correctly and securely by the client/driver.