Accidentally logging passwords, tokens, or personal data is a serious security risk that can expose sensitive information in log aggregators, monitoring tools, and stdout captures. As the creator of CoreUI with 25 years of backend development experience, I’ve seen production incidents caused by tokens appearing in plain-text logs. The safest approach is to use a structured logger like Pino or Winston with built-in redaction support that strips sensitive fields before they’re ever written. This ensures credentials never appear in logs regardless of which developer added the log statement.