How to remove/deactivate API client

As descibed in the docs (Getting Started with the AirVantage API - av - Sierra Wireless), an API client has to be created to access the API, at Sierra Wireless.

I can add new clients.
However, how can I remove clients when they are no longer used, or were only added for testing?
There is no such button. Also not in the “edit” view.

Also, another problem:
The “API Key” field is to short, and the value is cropped.
The only way to actually copy the secret key seems to be to use the browser dev tools and copy the value from the DOM directly… Is anyone at SWIR actually using/testing this API?