where to add the OPENAI_API_KEY?

[alipschutzsecuritize]

This should be a stupid question.
But I downloaded the code, added a .env file, and added the OPENAI_API_KEY key:
OPENAI_API_KEY=sk-proj-ul8LSbIjofEoQGSDxWQpMz.....

then node examples/blablabla.js

Then I get:

node:internal/modules/run_main:129
    triggerUncaughtException(
    ^

LoadAPIKeyError [AI_LoadAPIKeyError]: OpenAI API key is missing. Pass it using the 'apiKey' parameter or the OPENAI_API_KEY environment variable.

What am I missing?
Many thanks..

[Mish Ushakov]

Set it in your environment variable :)