in apache airflow i am creating a create table task but on execution is show database is not connected, i am using mysql to coonect database

version: '2.1'
services:
    postgres:
        image: postgres:9.6
        environment:
            - POSTGRES_USER=airflow
            - POSTGRES_PASSWORD=airflow
            - POSTGRES_DB=airflow
    mysql:

        image: mysql:5.7.27
        environment:
            - MYSQL_ROOT_PASSWORD=root
        volumes:
            - ./mysql_data: /var/lib/mysql-files/
            - ./mysql.cnf: /etc/mysql/mysql.cnf    
    webserver:
        image: puckel/docker-airflow:1.10.9
        restart: always
        depends_on:
            - postgres
            - mysql
        environment:
            - INSTALL_MYSQL=y
            - LOAD_EX=n
            - EXECUTOR=Local
            - AIRFLOW__SMTP__SMTP_HOST=smtp.gmail.com
            - AIRFLOW__SMTP__SMTP_USER=govinadav172@gmail.com
            - AIRFLOW__SMTP__SMTP_PASSWORD=4ghhjhvhhjhh
            - AIRFLOW__SMTP__SMTP_PORT=587
            - AIRFLOW__SMTP__SMTP_MAIL_FROM=govind
        volumes:
            - ./dags: /usr/local/airflow/dags
            - ./ip_files: /usr/local/airflow/ip_files
            - ./op_files: /usr/local/airflow/op_files
            # Uncomment to include custom plugins
            # - ./plugins:/usr/local/airflow/plugins
        ports:
            - "8080:8080"
        command: webserver
        healthcheck:
            test: ["CMD-SHELL", "[ -f /usr/local/airflow/airflow-webserver.pid ]"]
            interval: 30s
            timeout: 30s
            retries: 3