def security_group_id
      resp = ec2.describe_security_groups(filters: [
        {name: "vpc-id", values: [vpc_id]},
        {name: "group-name", values: ["default"]}
      ])
      resp.security_groups.first.group_id
    end
def security_group_id
      resp = ec2.describe_security_groups(filters: [
        {name: "vpc-id", values: [vpc_id]},
        {name: "group-name", values: ["default"]}
      ])
      resp.security_groups.first.group_id
    end
default security group