Xtykutl

I wrote this function that get 2 parameter X and Y and return Movies that created between this 2 years. but I get an error that says to me :

UnhandledPromiseRejectionWarning: CastError: Cast to number failed for value "undefined" at path "year" for model "movie"

and this is my function :

async function returnMoviesBetweenXandY(){



const X =  await rl.question('enter the first number : ')

const Y =  await rl.question('enter the second number : ')

const a = await Movie.find({}).sort('-year').where('year').gt(X).lt(Y).sort('rank')

const temp =await Promise.map(a, getTitle)

return X;



}

returnMoviesBetweenXandY().then(function(result){console.log(result)})

what is wrong in my code?