The link again is here: https://community.openai.com/t/openais-bring-your-own-key-policy/14538/2
ishant.singh - OpenAI Staff
Thanks for checking. For security purposes, users are not permitted to share their API keys with others, including via bring-your-own-key applications.
If a hack of your service would expose user’s API keys - or if you are able to obtain them in any way at all being the sysadmin – because they are being sent to you, than again, a 
.
See other topics here you can search along the lines of “my account was deactivated and banned because I put my API key into the janitor.ai service”