Cant add data to user table

Hey, Im just making a simple Gemini Nextjs App but the logic for adding additional credits after stripe payment isnt implementing Basically I want to create a user if it doesnt exist or update the user if it exist https://github.com/Raunak0713/AI_Content/ This is my github link The problem is in src/app/api/webhook/route.ts Thank you, any help is appriciated

GitHub

GitHub - Raunak0713/AI_Content

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