This Terraform example configurations uses the IBM Cloud provider to provision virtual machines on IBM Cloud Infrastructure (SoftLayer) and TerraForm Module ICP Deploy to prepare VSIs and deploy IBM Cloud Private on them in Highly Available configuration. This Terraform template automates best practices learned from installing ICP on IBM Cloud Infrastructure.
When using sl_username = "IBMxxxx" and sl_api_key = "xxxxx", the script throws the error above.
I commented out these variables, and use environment variables SL_USERNAME and SL_API_KEY instead and that fixed the install for me.