How to connect managed database (postgres) with ssl-mode="varify-full" in django app?

Hello. Currently I have a django app running on a droplet. And I am using your Managed Database for postgresql. Currently my connection has ssl-mode set to ‘require’, but I want to change the ssl-mode to ‘varify-full’. I have changed django app settings like the following:

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.postgresql_psycopg2',
        'NAME': DATABASE_NAME,
        'USER': DATABASE_USER,
        'PASSWORD': DATABASE_PASSWORD,
        'HOST': DATABASE_HOST,
        'PORT': DATABASE_PORT,
        'OPTIONS': {
            'sslmode': 'varify-full',
        },
    }
}

I have downloaded the CA certificate given in the database cluster overview page in connection details. I have put the certificate in ~/.postgresql/ folder. I have read the postgres documentation and realized that I need four files ~/.postgresql/postgresql.crt ~/.postgresql/postgresql.key ~/.postgresql/root.crt ~/.postgresql/root.crl

Where can I find the other files? Please Someone give a proper guidence about how to do this step by step as I am a complete newbie in this field. Thanks in advance.