invalid bytes32 value - Maker Contract Call

I am trying to call the Maker CDP Contract manager smart contract.

I want to get the information from this public mapping in the contract.

mapping (bytes32 => Cup) public cups

and should return a mapping:

 struct Cup { address lad; // CDP owner uint256 ink; // Locked collateral (in SKR) uint256 art; // Outstanding normalised debt (tax only) uint256 ire; // Outstanding normalised debt } 

Where bytes32 should be a bytes representation of the CDPId. They have a python implementation that passes a value to this mapping from a function that looks like this.

def int_to_bytes32(value: int) -> bytes: assert(isinstance(value, int)) return value.to_bytes(32, byteorder='big' 

I've tried this:

myContract.methods.cups(web3.utils.fromAscii("5")).call( function (err, res){ console.log(res) } ) 

However, I cannot figure out for my life how to pass the proper ID of say 5 to the bytes32 mapping and return the proper output. Everything returns with 0's even though I know that is incorrect.

Any help is appreciated.