What is the primary function of the 'terraform login' command?

The 'terraform login' command is designed to facilitate authentication for Terraform users with a HashiCorp Vault or Terraform Cloud account. This command generates an authentication token that enables Terraform to securely interact with Terraform Cloud's features, such as remote state storage and workspace management. By executing this command, users can establish a secure connection between their local Terraform environment and Terraform Cloud, ensuring that their operational actions are authenticated and authorized.

This fundamental authentication step is essential when working in collaborative environments or using remote backends, where Terraform needs to identify the user and control access to resources effectively. Therefore, confirming the successful execution of this command is crucial for leveraging the full capabilities of Terraform Cloud or Vault in the management and orchestration of infrastructure.