[BUG]: v6.13.0 lower cases all team members

[gaima8]

Expected Behavior

Usernames shouldn't be lowercased, of if they are lowercased consistently lowercased.
v6.13.0 brought in some lowercasing on team members, v6.12.1 was good.

Actual Behavior

  # github_team_members.misc_devs has changed
  ~ resource "github_team_members" "misc_devs" {
        id        = "123456"
        # (2 unchanged attributes hidden)

      - members {
          - role     = "member" -> null
          - username = "ChrisSomethingSomething" -> null
        }
      + members {
          + role     = "member"
          + username = "chrissomethingsomething"
        }

        # (6 unchanged blocks hidden)
    }

  # github_team_members.misc_devs will be updated in-place
  ~ resource "github_team_members" "misc_devs" {
        id        = "123456"
        # (2 unchanged attributes hidden)

      - members {
          - role     = "member" -> null
          - username = "chrissomethingsomething" -> null
        }
      + members {
          + role     = "member"
          + username = "ChrisSomethingSomething"
        }

        # (6 unchanged blocks hidden)
    }

Terraform Version

OpenTofu v1.12.0
on linux_amd64

• provider registry.opentofu.org/integrations/github v6.13.0

GitHub Installation Type

• GitHub.com (Free, Pro, or Team)
• GitHub Enterprise Server (on-premises)
• GitHub Enterprise Cloud with Personal Accounts (github.com)
• GitHub Enterprise Cloud with Managed Users/EMU (github.com)
• GitHub Enterprise Cloud with Data Residency (*.ghe.com)
• I don't know

Affected Resource(s)

• github_team_members

Terraform Configuration Files

Steps to Reproduce

No response

Debug Output

Code of Conduct

• I agree to follow this project's Code of Conduct

[github-actions]

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[dncrews]

+1: This bug creates a permadiff. We have one user who suddenly gets 4-6 emails every time we do a terraform apply because they are removed and then added right back to multiple groups due to this bug.

[reececomo]

Same issue. Unable to revert due to:

Error: Resource instance managed by newer provider version

Any ETA on a fix forward?

[cattruscott]

It appears that this section replaced the previous teamMembersAndMaintainers and changed from member.Node.Login to strings.ToLower(edge.Node.Login)

[stevehipwell]

It looks like we need to add diff suppression to ignore case changes, internally the provider needs to use a consistent case.