Error on undefined contentType

[jneidel]

/home/jneidel/scripts/cron/signal-to-inbox:87
      logError( `FileExt is empty and contentType of ${contentType} is not being matched for attachement ${id}` );
                                                       ^

ReferenceError: contentType is not defined
    at returnFileExtForContentType (/home/jneidel/scripts/cron/signal-to-inbox:87:56)
    at writeAttachment (/home/jneidel/scripts/cron/signal-to-inbox:105:15)
    at /home/jneidel/scripts/cron/signal-to-inbox:155:52
    at Array.forEach (<anonymous>)
    at /home/jneidel/scripts/cron/signal-to-inbox:155:27
    at Array.forEach (<anonymous>)
    at /home/jneidel/scripts/cron/signal-to-inbox:153:11
    at process.processTicksAndRejections (node:internal/process/task_queues:95:5)