Launching AWS aurora MySQL RDS global cluster with

Question

Following the documentation here https://www.terraform.io/docs/providers/aws/r/rds_global_cluster.html

launching a global RDS gobal cluster which involves having a primary cluster in one region and a secondary cluster in another region will require launching resources in 2 different regions but there is no explanation of how this will work in the documentation

How am i suppose to run terraform apply on the definitions to launch the global cluster since this requires 2 regions? Has anyone being successful in using terraform to launch this?

Getting the following errors at the moment

$terraform plan -var-file=dev.tfvars

Error: Error asking for user input: 1 error(s) occurred:

* Cycle: aws_rds_cluster_instance.db-west, aws_rds_cluster.db-west