DATABASE_URL="postgresql://localhost" REDIS_URL=redis://localhost:6379 CELERY_TASK_SERIALIZER=json DEBUG=True MQTT_CLIENT=local APP_MAIL_USERNAME=final.iot.backend.mailer@gmail.com APP_MAIL_PASSWORD=FinalIoT1234 FLASK_ENV=development MAILGUN_SMTP_SERVER=smtp.googlemail.com MAILGUN_SMPT_PORT=465 MAILGUN_SMPT_LOGIN=final.iot.backend.mailer@gmail.com MAILGUN_SMPT_PASSWORD=FinalIoT1234