chore(logs): add env var to control visibility in logs

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Latest commit: 9a65cd36014da4a734444e8e1bce79fddb9ce1e0

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| Name | Type | | ----------- | ----- | | hasura-auth | Patch |

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[dbarrosop]

Should we update the environment variables docs? Make emphasis this isn't recommended in production as it will log user credentials and other sensitive information.