fix: use new env variables with RSA keys
What does this merge request do and why?
We are now using different RSA keys to encode tokens. We should use these same keys to decode the tokens, otherwise it won't work.
This MR is a quick fix for that. In a follow-up we will use the new Config settings flow to read these variables.
Merge request checklist
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Tests added for new functionality. If not, please raise an issue to follow up. -
Documentation added/updated, if needed.