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Hi, I am working with Pulumi typescript and following the kubernetes getting started example.
at one point we get the IP address of a service
```const ip = frontend.status.loadBalancer.apply(
    (lb) =&gt;  lb.ingress[0].ip || lb.ingress[0].hostname
);```
I am trying to use this IP in a client (Browser) application configuration. But I am not able to convert it into a string . I tried different methods including
```ip.apply(i =&gt; `http://${i}/abc`)```
Second
```pulumi.interpolate `http://${ip}/abc````
Third
```pulumi.concat(`http://`, ip, `/abc`)```
Every time I get the same error, `toString()`  is not supported, or `toJSON()`  is not supported. Can someone help me please ?

All 3 options return an `Output&lt;string&gt;`, and you can’t call `toString()` or `toJSON()` on outputs. `Output&lt;T&gt;` is are similar to a promise, in that it represents a value that might not be present. Because an `Output&lt;T&gt;` might not ever resolve (for example, during `pulumi preview`), it can’t be awaited. You need to put whatever needs a raw `string` inside an `apply`.