Import as es6 module not working - could not find declaration file for module 'mongoose-intl'

[siddharth]

I am trying to use this in express v4.16 on node v16.14.
I have setup express to use es6 syntax (and hence es6 imports for modules only, no require).

I am getting an error in one of my controllers :
TypeError: controllerName.setLanguage is not a function

This was functioning perfectly fine in a previous version of the same app which was not using es6 modules and was using the require('mongoose-intl') syntax.

This is how I am trying to import in app.js :
import mongooseIntl from 'mongoose-intl';

VS Code is giving the following hint in the import statement -

Could not find a declaration file for module 'mongoose-intl'.

Please help.