[ Bug ] Disabling email login break Python token generation script

[gwright99]

Setting flag_disable_email_login = true in terraform.tfvars appears to cause the _get_access_token.py script to fail.

The script does not fail when email is allowed.

[gwright99]

As per Seqera Engineering:

• Setting flag_disable_email_login = true causes an error to be returned by the {TOWER_API_ENDPOINT}/gate/access endpoint if called with an email address.
• The token script calls this endpoint to initiate the token generation.
• OIDC flow as a replacement is a non-starter -- this would be happening on an instance with a pre-existing IDP session.

Potential Short-Term Workarounds

1. Don't allow flag_run_seqerakit = true if flag_disable_email_login = true
   Automation logic would not need to change, but it means seqerakit could not be run on the very first deployment.

2. Boot Tower with email enabled, generate a token, stop Tower, update tower.yml to disable email, reboot Tower, run Seqerakit.
   This is super clunky and I hate it. Multiple new branches of logic will need to be created.

3. Other solution?

Potential Long-Term Workarounds

1. Have Tower generate a root PAT on first invocation (like Gitlab).