Command line argument taken over supplied function parameter in script

I wrote a node.js script to use for running db-migrate commands. Here is the source:
https://pastebin.com/dHkwJnE1
I run it as
`node migrate-script.js create my_migration`
It works but migration ends up being called `create` and not `my_migration`
It seems that it will ignore function parameter and take just the first command line argument.

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