Unable to upload image using Api in Nodejs

I am working with Nodejs and i am using express js,Right now i am trying to upload image using API,But right now i am getting following error

Route.post() requires a callback function but got a [object Undefined]

Here is my "api.router.js" file

const multer  = require('multer')

router.post('/uploadimage', apiController.upload);

And here is my controller file(apicontroller) code

const storage = multer.diskStorage({

  destination: function (req, file, cb) {

    cb(null, 'uploads/')

  },

  filename: function (req, file, cb) {

    cb(null, file.fieldname + '-' + Date.now())

  }

})

const upload = multer({ storage: storage })

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