Checking if data matches in table

[SuperTempAccount]

Hey all,

Hope you can help with this tricky situation.
I don't know how to return an entire column of values from a table.

There is a table with a column of ID numbers.
There is a variable with one ID.

I want to check if the variable ID matches any of the ID numbers in the column.

This is the JS code I'm using

const idArray = automaRefData('table', 'idColumn');
const myID = automaRefData('variables', 'listingID');

console.log("All IDs: " + idArray); // returns undefined
console.log("This listing: " + myID); // returns correct value

return idArray.includes(myID); // error

Is there another way I can achieve this?
I want to check if a value already exists in my table.

Thanks heaps