Serverless configuration for RDS authentication

serverless.yml

provider:
  name: aws
  runtime: python3.7
  stage: 'production'
  region: us-east-1
  iamRoleStatements:
    - Effect: "Allow"
      Action:
        - "rds:*"
        - "sts:*"
      Resource:
        - "*"
# VPC configurations
functions:
  lambda_abc:
    handler: handler.lambda_abc
    vpc:
      subnetIds:
        - subnet-XXXXXXXXXXXXXXXXX
        - subnet-YYYYYYYYYYYYYYYYY
      securityGroupIds:
        - sg-ZZZZZZZZZZZZZZ