How to secure important data with environments in Python

(Env) ┌─[kubernetes@kubernetes]─[~/Django/django] 
└──╼ $ pip install python-decouple
Requirement already satisfied: python-decouple in /home/kubernetes/Env/lib/python3.6/site-packages

from decouple import config

token = config('SLACK_KEY')
client = WebClient(token=token)
channel_id = config('CHANNEL_ID')

# Server Docker
mydb = mysql.connector.connect(
    host=config('DATABASE_HOST'),
    user=config('DATABASE_USER'),
    passwd=config('DATABASE_PASSWORD'),
    database=config('DATABASE_NAME'),
    port=config('DATABASE_PORT'),
    charset="utf8mb4",
)
mycursor = mydb.cursor()

SLACK_KEY = '****************************************'
CHANNEL_ID = '****************************'
DATABASE_NAME=issue
DATABASE_USER=root
DATABASE_PASSWORD=password
DATABASE_HOST=192.168.8.50
DATABASE_PORT=3306