Accessing Plant data

I’m interested in using the request builder for accessing PlanetScope data in Sentinel Hub.
I already have an Planet account with download quota (Education and Research).
Is there a way I can use my existing Planet credentials to access the data?
When I tried to put my Planet API Key in request builder it shows “Invalid Format” error
Many thanks

We have configured your account in a way that you should be able to use your own API key.

Use these instructions to copy the API key from your Planet dashboard.