Add Integration test for article

src/test/kotlin/integration/Register routes.kt

@@ -3,21 +3,14 @@ package integration
 import integration.asserts.`Then the response should be`
 import integration.asserts.`when`.`When I send a POST request`
 import io.ktor.http.HttpStatusCode
-import io.ktor.locations.KtorExperimentalLocationsAPI
-import io.ktor.util.KtorExperimentalAPI
-import kotlinx.coroutines.ExperimentalCoroutinesApi
 import org.amshove.kluent.`should be null`
 import org.amshove.kluent.`should contain`
 import org.amshove.kluent.`should not be null`
-import org.junit.experimental.categories.Category
 import org.junit.jupiter.api.Tag
 import org.junit.jupiter.api.Tags
 import org.junit.jupiter.api.Test
 import org.junit.jupiter.api.TestInstance
 
-@ExperimentalCoroutinesApi
-@KtorExperimentalLocationsAPI
-@KtorExperimentalAPI
 @TestInstance(TestInstance.Lifecycle.PER_CLASS)
 @Tags(Tag("integration"), Tag("auth"))
 class `Register routes` : BaseTest() {