fix: typo in user_usage.py

[eltociear]

Description

occured -> occurred

Checklist before requesting a review

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• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I have commented hard-to-understand areas
• I have ideally added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged

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