How to populate request dictionary with usernames

main.py

# Loop through all requests
for request in requests:
    # Query the DB to get the username of the receiver in this request
    query = """
        SELECT username FROM users WHERE user_id = ?;
    """
    result = sql.execute(query, [request["receiver"]]).fetchone()
    # Add the username to the request dictionary
    request["username"] = result["username"]