[New Resource] aws_cognito_managed_login_branding

[tabito-hara]

Rollback Plan

If a change needs to be reverted, we will publish an updated version of the library.

Changes to Security Controls

Are there any changes to security controls (access controls, encryption, logging) in this pull request? If so, explain.

Description

memo

• JSON normalization
• asset ForceNew
• waiter not implemented

Relations

Closes #42580

References

https://docs.aws.amazon.com/cognito-user-identity-pools/latest/APIReference/API_ManagedLoginBrandingType.html

Output from Acceptance Testing

$ make testacc TESTS=TestAccCognitoIDPManagedLoginBranding_ PKG=cognitoidp               
make: Verifying source code with gofmt...
==> Checking that code complies with gofmt requirements...
TF_ACC=1 go1.23.9 test ./internal/service/cognitoidp/... -v -count 1 -parallel 20 -run='TestAccCognitoIDPManagedLoginBranding_'  -timeout 360m -vet=off
2025/05/24 23:35:17 Initializing Terraform AWS Provider...
=== RUN   TestAccCognitoIDPManagedLoginBranding_basic
=== PAUSE TestAccCognitoIDPManagedLoginBranding_basic
=== RUN   TestAccCognitoIDPManagedLoginBranding_asset
=== PAUSE TestAccCognitoIDPManagedLoginBranding_asset
=== RUN   TestAccCognitoIDPManagedLoginBranding_settings
=== PAUSE TestAccCognitoIDPManagedLoginBranding_settings
=== RUN   TestAccCognitoIDPManagedLoginBranding_disappears
=== PAUSE TestAccCognitoIDPManagedLoginBranding_disappears
=== CONT  TestAccCognitoIDPManagedLoginBranding_basic
=== CONT  TestAccCognitoIDPManagedLoginBranding_settings
=== CONT  TestAccCognitoIDPManagedLoginBranding_disappears
=== CONT  TestAccCognitoIDPManagedLoginBranding_asset
--- PASS: TestAccCognitoIDPManagedLoginBranding_disappears (24.47s)
--- PASS: TestAccCognitoIDPManagedLoginBranding_basic (26.73s)
--- PASS: TestAccCognitoIDPManagedLoginBranding_settings (50.63s)
--- PASS: TestAccCognitoIDPManagedLoginBranding_asset (63.07s)
PASS
ok      github.com/hashicorp/terraform-provider-aws/internal/service/cognitoidp 67.565s

[github-actions]

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[tabito-hara]

I realized I need to reconsider several issues (including schema design), especially because UpdateManagedLoginBranding uses a PATCH model.

This PR is being closed for now and will be resubmitted later.

[github-actions]

Warning

This Issue has been closed, meaning that any additional comments are much easier for the maintainers to miss. Please assume that the maintainers will not see them.

Ongoing conversations amongst community members are welcome, however, the issue will be locked after 30 days. Moving conversations to another venue, such as the AWS Provider forum, is recommended. If you have additional concerns, please open a new issue, referencing this one where needed.

[github-actions]

I'm going to lock this pull request because it has been closed for 30 days ⏳. This helps our maintainers find and focus on the active issues.
If you have found a problem that seems related to this change, please open a new issue and complete the issue template so we can capture all the details necessary to investigate further.