Scala Play: reading conf

// Let's read config with custom types (see basic example at https://pastebin.com/1hFjBN1A)

// TestController.scala
import javax.inject.Inject
import play.api.Configuration
import play.api.mvc._

class TestController @Inject()(
    cc: ControllerComponents,
    appConf: Configuration
  )extends AbstractController(cc) {

  val reportsName: Option[String] = appConf.get[Option[String]]("students.reports.name")
  val lastException: Option[Exception] = appConf.get[Option[Exception]]("students.reports.exception")

  // add to routes file: GET    /testConfig    controllers.TestController.testConfig
  def testConfig: Action[AnyContent] = Action(parse.json) {
    Ok(s"Name: $reportsName; Last error: $lastException")
  }
}

// application conf:
students.reports {
  name = "qwerty"
  exception = "Smth not found"
}

        // Compile output:
        // Error:(13, 72) could not find implicit value for parameter loader: play.api.ConfigLoader[Option[Exception]]
        //  val lastException: Option[Exception] = appConf.get[Option[Exception]]("students.reports.exception")

// We must create custom loader for java.lang.Exception type.
// Let's create a loader for a common case: for our case class
import javax.inject.Inject
import com.typesafe.config.Config
import play.api.{ConfigLoader, Configuration}
import play.api.mvc._

class TestController @Inject()(
    cc: ControllerComponents,
    appConf: Configuration
  ) extends AbstractController(cc) {

  case class MyConfig(reportsName: String, lastException: Exception)

  implicit val cfgLoader = new ConfigLoader[MyConfig] {
    override def load(config: Config, path: String): MyConfig = {
      val conf = config.getConfig(path)
      MyConfig(conf.getString("name"), new Exception(conf.getString("exception")))
    }
  }

  val myCfg: Option[MyConfig] = appConf.get[Option[MyConfig]]("students.reports")

  // add to routes file: GET    /testConfig    controllers.TestController.testConfig
  def testConfig: Action[AnyContent] = Action(parse.json) {
    Ok(s"Result: $myCfg")
  }
}

// Output:
// http://localhost:9000/testConfig
// Result: Some(MyConfig(qwerty,java.lang.Exception: Smth not found))