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>This is probably the most stupid thing I ever did. One missing return; ended up costing me $206.

No, dear author. Setting up the AWS billing alarm was the smartest thing you ever did. It probably saved you tens of thousands of dollars (or at least the headache associated with fighting Amazon over the bill).

Developers make mistakes. It's part of the job. It's not unusual or bad in any way. A bad developer is one who denies that fact and fails to prepare for it. A great developer is one like the author.

Just wanted to say that last paragraph is one of the simplest descriptions of professionalism in the job I have read - accept and prepare for your own human failings :-)

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