Terraform init: Error: Missing input for argument [auth_url]

# Short Description of the issue

After https://github.com/EGI-Federation/fedcloud-dashboard/pull/44 we get a failed `terraform init` with:

```bash
Error: Missing input for argument [auth_url]
```

However, there is nothing relevant in: https://github.com/hashicorp/setup-terraform/blob/main/CHANGELOG.md

Since the dashboard is up and running I am not going to troubleshoot further and leave this issue here for future reference.

## Environment

- Operating System:
- Other related components versions:

## Steps to reproduce

## Logs, stacktrace, or other symptoms

```shell
output
```

# Summary of proposed changes

Start by reproducing `terraform init` after PR #44 and compare the configuration and workflow changes with the `hashicorp/setup-terraform` changelog. Trace where `auth_url` is expected and record the relevant environment and component versions. Done means the initialization succeeds or the missing input is isolated with reproducible steps.

Written by the indexing model from the issue text.