It looks like there are syntax errors in your User model, particularly with the fetch_by_uniq_keys(email:) and raise(ActiveRecord::RecordNotFound.new(slug:)) lines. The issue seems to be related to missing arguments or incorrect syntax. Double-check the method definitions and ensure all required arguments are passed correctly. Additionally, make sure your database migrations are up-to-date to avoid issues like the missing settings table. If you are also learning to code you might find tools like grade calculator helpful for organizing and tracking your grades.

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