References

Terraform references are not required to be defined in order. You can define something which has dependencies before those dependencies are declared are terraform will figure out which order to create things in.

You can reference dependent resources within your terraform file by using the resource type, name and property with the pattern <RESOURCE_TYPE>.<RESOURCE_NAME>.<RESOURCE_PROPERTY>.

resource "some_resource" "some_name" {
    # config
}

resource "dependent_resource" "name" {
    some_property = some_resource.some_name.id
}