fix: [UIE-10396] - Await permissions to show error on User Detail

[abailly-akamai]

Description 📝

Small PR to prevent showing the permission error when editing own username in the IAM UI

Changes 🔄

List any change(s) relevant to the reviewer.

• Await permissions to show error on User Detail

Scope 🚢

Upon production release, changes in this PR will be visible to:

• All customers
• Some customers (e.g. in Beta or Limited Availability)
• No customers / Not applicable

Preview 📷

Fixing this 👇

Screen.Recording.2026-03-03.at.17.18.00.mov

How to test 🧪

Prerequisites

Reproduction steps

(How to reproduce the issue, if applicable)

• Navigate to /iam/users/<user>/details, being the current user
• Update username
• 🚫 Notice error flashing before render

Verification steps

• Navigate to /iam/users/<user>/details, being the current user
• Update username
• ✅ Confirm no error flashing before render

Author Checklists

As an Author, to speed up the review process, I considered 🤔

👀 Doing a self review
❔ Our contribution guidelines
🤏 Splitting feature into small PRs
➕ Adding a changeset
🧪 Providing/improving test coverage
🔐 Removing all sensitive information from the code and PR description
🚩 Using a feature flag to protect the release
👣 Providing comprehensive reproduction steps
📑 Providing or updating our documentation
🕛 Scheduling a pair reviewing session
📱 Providing mobile support
♿ Providing accessibility support

• I have read and considered all applicable items listed above.

As an Author, before moving this PR from Draft to Open, I confirmed ✅

• All tests and CI checks are passing
• TypeScript compilation succeeded without errors
• Code passes all linting rules

[linode-gh-bot]

Cloud Manager UI test results

🔺 3 failing tests on test run #2 ↗︎

❌ Failing	✅ Passing	↪️ Skipped	🕐 Duration
3 Failing	866 Passing	11 Skipped	37m 56s

Details

Failing Tests
	Spec	Test
❌	account-switching.spec.ts	Cloud Manager Cypress Tests→Parent/Child account switching→From Child to Parent » can switch from Proxy user back to Parent account user from Billing page
❌	account-switching.spec.ts	Cloud Manager Cypress Tests→Parent/Child account switching→From Child to Child » can switch to another Child account as a Proxy user
❌	object-storage.e2e.spec.ts	Cloud Manager Cypress Tests→object storage end-to-end tests » can create and delete object storage buckets

Troubleshooting

Use this command to re-run the failing tests:

pnpm cy:run -s "cypress/e2e/core/parentChild/account-switching.spec.ts,cypress/e2e/core/objectStorage/object-storage.e2e.spec.ts"