ESM export default on providers

[moshie]

Hi,

We have an internal package which pulls in next-auth our package is bundled using tsup.

We noticed when attempting to import a provider that the providers are using default exports which breaks our implementation.

This problem occurs when library authors compile ES modules that use export default to CommonJS with a transpiler that does not add the module.exports compatibility strategy discussed above (such as tsc itself). Library authors who ship CommonJS to npm are encouraged not to use default exports, or to apply a transform to their output that applies such a compatibility layer.

Essentially:

export = provider

Needs to be added to all of the providers and backported to 4.*

See:
https://arethetypeswrong.github.io/[email protected]
&
https://blog.andrewbran.ch/default-exports-in-commonjs-libraries/#the-simplest-solution

And:
https://github.com/arethetypeswrong/arethetypeswrong.github.io/blob/main/docs/problems/CJSOnlyExportsDefault.md

Similar problem:

styled-components/styled-components#3437 (comment)