A HashiCorp Terraform example demonstrates how to automate least-privilege access to Consul using Vault, ensuring secure access control and scalability. By defining policies as code with Terraform, teams can collaborate on Consul ACLs and maintain security through infrastructure as code practices. The use of the Consul secrets engine generates dynamic ACL tokens on-demand, handling token lifetimes, and automating token renewal or revocation when necessary. This approach enables secure collaboration and scaling of Consul ACL policies while maintaining visibility into access control changes.