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I need set NSURLSessionConfiguration into IosClientEngineConfig, how to do it ?

I’m having the same issue, need to set `NSURLSessionConfiguration` into `IosClientEngineConfig` but don’t know how to set.
I’m using `ktor-client-iOS` 1.6.7

You can use the `configureSession` method to mutate an `NSURLSessionConfiguration` :
```val client = HttpClient(Darwin) { // `Ios` for Ktor 1.6.7
    engine {
        configureSession { // this: NSURLSessionConfiguration
            // mutate configuration here
        }
    }
}```

Hi <@U017TSBJ2C9>
Thanks for your suggestion.
Currently in my situation, I want to inject a `NSURLSessionConfiguration` from native into `HttpClient(Darwin)`
Ex:
• On Swift code, I have a  `URLSessionConfiguration.default` &amp; want to pass it to KMM
• On KMM code, how can we config for this case with `HttpClient(Darwin)`

```val client =  HttpClient(Darwin) {
        config(this)
        engine {
            configureSession {  
                // How can I inject NSURLSessionConfiguration from native here
            }
        }
    }```

You can find an information about using Swift library from Kotlin code <https://kotlinlang.org/docs/native-objc-interop.html#usage|here>. Unfortunately, there is no way to pass a configuration object and you can only mutate the one that is created by Ktor.

In Ktor 2.1.0 (will be released soon) you can use preconfigured session object like so:
```val config = NSURLSessionConfiguration.defaultSessionConfiguration()
val session = NSURLSession.sessionWithConfiguration(config)

val client = HttpClient(Darwin) {
    engine {
        usePreconfiguredSession(session)
    }
}```

It’s really helpful information.
Thanks for your quickly response.
I will wait for `2.1.0` version to update it.