Describe the bug
Currently OpenAI key is marked as invalid if key's lengh isn't 51

To Reproduce
Use default template and input OpenAI key.

Expected behavior
When I input a valid OpenAI key, it should not be assumed as invalid even if the length isn't 51.

Actual behavior
An OpenAI key is assumed as invalid and I cannot run a pipeline.

Screenshots

Additional context
I'm willing to open a PR.