Implementing Listener into a java - Kotlin plugin - kotlin

Im trying to create a Minecraft Plugin using Kotlin, I converted the project to kotlin and did all the necessary stuff, I created an event listener but havent figured how to implement the Listener interface.
import org.bukkit.Material
import org.bukkit.entity.Creeper
import org.bukkit.entity.Skeleton
import org.bukkit.entity.Zombie
import org.bukkit.event.EventHandler
import org.bukkit.event.entity.EntitySpawnEvent
import org.bukkit.inventory.ItemStack
import java.net.http.WebSocket.Listener
class MobSpawnEvent : Listener {
}
that's what I tried but it doesnt seem to work as my Main.class file says "Make MobSpawnEvent implement org.bukkit.listener"
I tried using the " : " operator but it didnt work

You are not importing the good class. java.net.http.WebSocket.Listener isn't from spigot, you should replace it by org.bukkit.listener.

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The problem is not even in the setup, but I installed the package '#videosdk.live/react-native-sdk', but I can't import methods from it.
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i have also checked
https://ktor.io/docs/migrating-2.html#testing-api
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https://insert-koin.io/docs/reference/koin-test/testing
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I am trying to implement kotlin backend with mongo DB and JWT, all requried dependencies are added as
ktor_version=2.1.0
kmongo_version=4.7.0
commons_codec_version=1.15
kotlin_version=1.6.21
logback_version=1.2.11
kotlin.code.style=official
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KMongo.createClient(connectionString = "....").coroutine.getDatabaseName(dbName)
error is still there even though the import is set manually
import org.litote.kmongo.coroutine.coroutine
Gradle dependencies:
implementation("io.ktor:ktor-server-call-logging-jvm:$ktor_version")
implementation("io.ktor:ktor-server-content-negotiation-jvm:$ktor_version")
implementation("io.ktor:ktor-server-core-jvm:$ktor_version")
implementation("io.ktor:ktor-serialization-kotlinx-json-jvm:$ktor_version")
implementation("io.ktor:ktor-server-auth-jvm:$ktor_version")
implementation("io.ktor:ktor-server-auth-jwt-jvm:$ktor_version")
implementation("io.ktor:ktor-server-netty-jvm:$ktor_version")
implementation("ch.qos.logback:logback-classic:$logback_version")
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testImplementation("org.jetbrains.kotlin:kotlin-test-junit:$kotlin_version")
implementation("org.litote.kmongo:kmongo:$kmongo_version")
implementation("org.litote.kmongo:kmongo-coroutine:$kmongo_version")
implementation("commons-codec:commons-codec:$commons_codec_version")
For KMongo, have to use following import
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Instead of
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I tried the following:
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Update:
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