Example rds.tf file
module "rds" {
source = "../../tf-aws-rds"
sg_name = "test"
name = "test"
size = "20"
engine = "mysql"
engine_version = "5.6"
db_instance = "db.t2.micro"
db_name = "test"
db_user = "test"
db_pass = "testing123"
}