Many tutorials use the following to access IPFS:

const ipfsClient = require('ipfs-http-client')
const ipfs = ipfsClient({ host: 'ipfs.infura.io', port: 5001, protocol: 'https' })

and than:

ipfs.add(buffer, (error, result) => {

I tried but it did not work for me. Maybe the versioning, maybe something else. That's why I resorted to :

const ipfsAPI = require('ipfs-api')
const ipfs = ipfsAPI('ipfs.infura.io', '5001', { protocol: 'https' })

If somebody know how to make the ipfsClient working, please let me know.