When using a custom template for a tracking pixel, you can ensure that sensitive API keys or account IDs are not exposed in the client-side code by avoiding hardcoding them directly into the template. Instead, implement a server-side lookup or use environment variables to retrieve these values dynamically. The preferred method is to use server-side lookups. Create a Google Cloud Function or similar serverless function that securely stores the API keys. The custom template then makes a....
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