diff not properly produced when overwriting options in auth0_connection

[sugitak]

Checklist

• I have looked into the README and have not found a suitable solution or answer.
• I have looked into the documentation and have not found a suitable solution or answer.
• I have searched the issues and have not found a suitable solution or answer.
• I have upgraded to the latest version of this provider and the issue still persists.
• I have searched the Auth0 Community forums and have not found a suitable solution or answer.
• I agree to the terms within the Auth0 Code of Conduct.

Description

When updating options in auth0_connection, the result diff is not properly produced. It only shows added or updated resources, and not the deleted ones.

Suppose you set your password_policy as "excellent" by hand. You import your config to Terraform without explicitly specifying options block. After a while you find you need to configure custom_scripts which will be defined in options. You create an options block with only custom_scripts defined. When you apply, you will lose all other options that were configured on auth0 tenant. The terraform-provider-auth0 only shows diffs that were added to options, and you will not be able to even notice you have deleted your password_policy.

This problem originates from auth0 API behavior, that when the options in connection is updated, API response is displaying just a part of the affected elements. We have confirmed this by asking the auth0 support team, and also filed a support ticket to enhance this behavior.
https://auth0.com/docs/api/management/v2/connections/patch-connections-by-id

This issue ticket is intended to share information to the community. Changing API behavior is not easy and takes time.

Expectation

After applying, auth0_connection.<name>.options should return all the configuration that are changed, including deleted parameters that were only defined in auth0 tenant and absent from Terraform configuration.

Workaround should be: putting notes on https://registry.terraform.io/providers/auth0/auth0/latest/docs/resources/connection

Reproduction

• Given:
  • create a connection by hand
  • password policy set by hand
• Then:
  • define auth0_connection on terraform
  • import connection without explicitly configuring options.password_policy
  • add new param to options, ex: options.custom_script
  • apply and see diff

Auth0 Terraform Provider version

v1.7.1

Terraform version

1.10.2