Create an AWS Security Group with "myip" as ingress rule

data "http" "myip" {
  url = "http://ipv4.icanhazip.com"
}

resource "aws_security_group_rule" "ingress_with_cidr_blocks" {
...
  ingress {
    from_port = 5432
    to_port = 5432
    protocol = "tcp"
    cidr_blocks = ["${chomp(data.http.myip.body)}/32"]
  }
...
}