Validate the following uses cases for the API Gateway:
#### Using OAuth clients created via Meta
- Owner-only clients (access token only)
- [x] Read
- [ ] Write
- Failed: See T267996
- OAuth 2.0 client credentials workflow (two-step authentication)
- [x] Read
- Failed immediately after creating the client, but worked once client was approved by admin
- [ ] Write
- Failed: See T267996
- OAuth 2.0 authorization code workflow (three-step authentication)
- [x] Read
- To do: Test with unapproved client
- [ ] Write
- Failed: See T267996
- [ ] Refresh
- Failed: See T268256
#### Using OAuth clients created via API Portal
Blocked by T262495
- Owner-only clients (access token only)
- [ ] Read
- [ ] Write
- OAuth 2.0 client credentials workflow (two-step authentication)
- [ ] Read
- [ ] Write
- OAuth 2.0 authorization code workflow (three-step authentication)
- [ ] Read
- [ ] Write
- [ ] Refresh