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Unfortunately, I believe this currently prevents the use of the `assumeRole` property.  We'll see what we can do to get a nearer term fix for this in.

It's possible that setting `assumeRole` to `"{ roleArn: \"arn:aws:iam::XXXXXXXX\" }"` (i.e. the JSON serialization of the value) would work, but I'm not sure.

Thanks <@UB3BGTV63>, this does seem to be related

<@U84HBHXS8> I tried various combinations of string quoting but generally typescript gets upset, I just tried your one but it also doesn't like it `error: [runtime] index.ts(26,35): error TS2345: Argument of type '{ assumeRole: string; region: Region; }' is not assignable to parameter of type 'ProviderArgs'.`

Oh, interesting. Can you try casting through `any`? e.g.
```
let p = new aws.Provider('audit', &lt;any&gt;{ assumeRole: "{ roleArn: \"arn:aws:iam::XXXXXXXX\" }", region: &lt;aws.Region&gt;region });
```

thanks <@U84HBHXS8> still learning typescript

      global: global
        error: could not validate provider       configuration: 1 error(s) occurred:

        * assume_role.0: expected object, got string

Looks like there is not a workaround at the moment, then.

We will see what we can do this week on this one.