CDK example of creating a database password secret

vpc_secrets_cdk_example.py

secrets_template = json.dumps({
    "username": f'{db_username}'
})
db_credentials_secret = secrets.Secret(self, id=f'{resource_prefix}-DBCredentialsSecret',
                                       secret_name=construct_id + '-rds-credentials',
                                       generate_secret_string=secrets.SecretStringGenerator(
                                           secret_string_template=secrets_template,
                                           exclude_punctuation=True,
                                           include_space=False,
                                           generate_string_key="password"
                                       ))