def __init__(self, username, password, destination_addresses):
        """Initialize GmailNotifier class

        Args:
            username (str): Username of the gmail account to use for sending message.
            password (str): Password of the gmail account to use for sending message.
            destination_addresses (list): A list of email addresses to notify.
        """

        self.logger = structlog.get_logger()
        self.smtp_server = 'smtp.gmail.com:587'
        self.username = username
        self.password = password
        self.destination_addresses = ','.join(destination_addresses)
Initialize GmailNotifier class

        Args:
            username (str): Username of the gmail account to use for sending message.
            password (str): Password of the gmail account to use for sending message.
            destination_addresses (list): A list of email addresses to notify.
        
app/notifiers/gmail_client.py