Credentials - Unable to add BingX with error `data`

[rapcmia]

Describe the bug

When checking deploy commit 84c68b7d3e95ff3e74a3fa1063b6f0eb3d30339f, adding bing_x would return data and failing with 400 Bad request on backend-api

However successfully added using POST /add-connector-keys/{account_name}/{connector_name} ✅

Steps to reproduce bug

1. Clone hummingbot deploy
2. Run sh setup.sh
3. Launch dashboard, go to credentials then add API keys of bing_x