Problem with custom app to connect with pipedrive

We are developing an app to connect pipedrive with Freshdesk, but I am stuck with this problem: Cannot set property 'apiToken' of undefined.

Note. This is the server.js code that is running locally at server side

const pipedrive = require("pipedrive")  

exports = {
getNote: async function (payload) {
    try {
        pipedrive.Configuration.apiToken = "XXXXXXXXXXXX"
        var Personctrl = pipedrive.PersonsController
        var Notasctrl = pipedrive.NotesController
        const searchPerson = await Personctrl.findPersonsByName({
            term: payload.email,
            searchByEmail: 1
        })

        if (searchPerson.data && searchPerson.data.length > 0) {
            for (const result of searchPerson.data) {
                console.log(`${result.name} (id: ${result.id})`)

                const searchResults = await Notasctrl.getAllNotes({
                    person_id: result.id
                })

                if (searchResults.data && searchResults.data.length > 0) {
                    const myJSON = JSON.stringify(searchResults.data)

                    renderData(null, myJSON)
                } else {
                    console.log("No notes found")
                }
            }
        } else {
            console.log("No user found")
            renderData(null)
        }
    } catch (error) {
        console.log(error)

        renderData(error)
    }
  }
}