diff --git a/build.gradle.kts b/build.gradle.kts
index 5494fcd..843889f 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -1,6 +1,6 @@
 plugins {
-    kotlin("multiplatform") version "1.7.10"
-    kotlin("plugin.serialization") version "1.7.10"
+    kotlin("multiplatform") version "1.7.21"
+    kotlin("plugin.serialization") version "1.7.21"
     `maven-publish`
 }
 
diff --git a/src/commonMain/kotlin/net.sergeych.superlogin/api.kt b/src/commonMain/kotlin/net.sergeych.superlogin/api.kt
index 4bb2892..71bfc41 100644
--- a/src/commonMain/kotlin/net.sergeych.superlogin/api.kt
+++ b/src/commonMain/kotlin/net.sergeych.superlogin/api.kt
@@ -2,6 +2,7 @@ package net.sergeych.superlogin
 
 import kotlinx.serialization.SerialName
 import kotlinx.serialization.Serializable
+import net.sergeych.boss_serialization_mp.BossEncoder
 import net.sergeych.boss_serialization_mp.decodeBoss
 import net.sergeych.parsec3.CommandHost
 import net.sergeych.parsec3.WithAdapter
@@ -18,14 +19,14 @@ data class RegistrationArgs(
     val packedACO: ByteArray,
     val extraData: ByteArray? = null
 ) {
-    fun toSuccess(loginToken: ByteArray,extraData: ByteArray? = this.extraData): AuthenticationResult.Success {
+    inline fun <reified T>toSuccess(loginToken: ByteArray,extraData: T): AuthenticationResult.Success {
         return AuthenticationResult.Success(
-            loginName, loginToken, extraData
+            loginName, loginToken, BossEncoder.encode(extraData)
         )
     }
 
-    inline fun <reified T>decodeOrNull(): T? = extraData?.let { it.decodeBoss() }
-    inline fun <reified T>decodeOrThrow(): T = extraData?.let { it.decodeBoss() }
+    inline fun <reified T>decodeOrNull(): T? = extraData?.let { it.decodeBoss<T>() }
+    inline fun <reified T: Any>decodeOrThrow(): T = extraData?.let { it.decodeBoss<T>() }
         ?: throw IllegalArgumentException("missing require extra data of type ${T::class.simpleName}")
 }
 
@@ -99,4 +100,5 @@ class SuperloginServerApi<T: WithAdapter> : CommandHost<T>() {
     val slChangePasswordAndLogin by command <ChangePasswordArgs,AuthenticationResult>()
 
     val slSendTestException by command<Unit,Unit>()
-}
\ No newline at end of file
+}
+
diff --git a/src/commonMain/kotlin/net.sergeych.superlogin/init.kt b/src/commonMain/kotlin/net.sergeych.superlogin/init.kt
index efa3a4e..428c71a 100644
--- a/src/commonMain/kotlin/net.sergeych.superlogin/init.kt
+++ b/src/commonMain/kotlin/net.sergeych.superlogin/init.kt
@@ -5,4 +5,4 @@ package net.sergeych.superlogin
  * Currently, it is mandatory for JS and is not needed on JVM platform, but
  * we recommend to call it anyway
  */
-expect suspend fun initOperations()
\ No newline at end of file
+expect suspend fun InitSuperlogin()
\ No newline at end of file
diff --git a/src/commonTest/kotlin/superlogin/AccessControlObjectTest.kt b/src/commonTest/kotlin/superlogin/AccessControlObjectTest.kt
index cd32422..89c1c82 100644
--- a/src/commonTest/kotlin/superlogin/AccessControlObjectTest.kt
+++ b/src/commonTest/kotlin/superlogin/AccessControlObjectTest.kt
@@ -2,7 +2,7 @@ package superlogin
 
 import kotlinx.coroutines.test.runTest
 import net.sergeych.superlogin.AccessControlObject
-import net.sergeych.superlogin.initOperations
+import net.sergeych.superlogin.InitSuperlogin
 import net.sergeych.unikrypto.SymmetricKeys
 import kotlin.test.Test
 import kotlin.test.assertEquals
@@ -13,7 +13,7 @@ internal class AccessControlObjectTest {
 
     @Test
     fun createRestoreTest() = runTest {
-        initOperations()
+        InitSuperlogin()
 
         val pk1 = SymmetricKeys.random()
         val pk2 = SymmetricKeys.random()
diff --git a/src/commonTest/kotlin/superlogin/RestoreKeyTest.kt b/src/commonTest/kotlin/superlogin/RestoreKeyTest.kt
index 2d19313..e50dcff 100644
--- a/src/commonTest/kotlin/superlogin/RestoreKeyTest.kt
+++ b/src/commonTest/kotlin/superlogin/RestoreKeyTest.kt
@@ -1,8 +1,8 @@
 package superlogin
 
 import kotlinx.coroutines.test.runTest
+import net.sergeych.superlogin.InitSuperlogin
 import net.sergeych.superlogin.RestoreKey
-import net.sergeych.superlogin.initOperations
 import kotlin.test.Test
 import kotlin.test.assertContentEquals
 import kotlin.test.assertEquals
@@ -12,7 +12,7 @@ internal class RestoreKeyTest {
 
     @Test
     fun checkRestoreKey() = runTest {
-        initOperations()
+        InitSuperlogin()
         val rk = RestoreKey.generate()
 
         val (id, k) = RestoreKey.parse(rk.secret)
diff --git a/src/jsMain/kotlin/net/sergeych/superlogin/initOperations.kt b/src/jsMain/kotlin/net/sergeych/superlogin/initOperations.kt
index 634c957..9bf5d39 100644
--- a/src/jsMain/kotlin/net/sergeych/superlogin/initOperations.kt
+++ b/src/jsMain/kotlin/net/sergeych/superlogin/initOperations.kt
@@ -3,7 +3,7 @@ package net.sergeych.superlogin
 import kotlinx.coroutines.await
 import net.sergeych.unikrypto.Unicrypto
 
-actual suspend fun initOperations() {
+actual suspend fun InitSuperlogin() {
     // library uses sync operations from unicrypto so:
     Unicrypto.unicryptoReady.await()
 }
\ No newline at end of file
diff --git a/src/jvmMain/kotlin/net/sergeych/superlogin/initOperations.kt b/src/jvmMain/kotlin/net/sergeych/superlogin/initOperations.kt
index 2b6ac05..299d320 100644
--- a/src/jvmMain/kotlin/net/sergeych/superlogin/initOperations.kt
+++ b/src/jvmMain/kotlin/net/sergeych/superlogin/initOperations.kt
@@ -1,5 +1,5 @@
 package net.sergeych.superlogin
 
-actual suspend fun initOperations() {
+actual suspend fun InitSuperlogin() {
     // Java version currently does not need initialization
 }
\ No newline at end of file
diff --git a/src/jvmMain/kotlin/net/sergeych/superlogin/server/SuperloginServer.kt b/src/jvmMain/kotlin/net/sergeych/superlogin/server/SuperloginServer.kt
index a17a34a..dc6d7de 100644
--- a/src/jvmMain/kotlin/net/sergeych/superlogin/server/SuperloginServer.kt
+++ b/src/jvmMain/kotlin/net/sergeych/superlogin/server/SuperloginServer.kt
@@ -159,7 +159,6 @@ inline fun <reified D, T : SLServerSession<D>, H : CommandHost<T>> AdapterBuilde
                     payload.newLoginKey,
                     payload.newLoginId
                 )
-                println(">> ${loginResult.loginToken} -- !")
             }
             loginResult
         } catch (_: IllegalArgumentException) {
diff --git a/src/jvmTest/kotlin/net/sergeych/WsServerKtTest.kt b/src/jvmTest/kotlin/net/sergeych/WsServerKtTest.kt
index 9c90144..1583738 100644
--- a/src/jvmTest/kotlin/net/sergeych/WsServerKtTest.kt
+++ b/src/jvmTest/kotlin/net/sergeych/WsServerKtTest.kt
@@ -158,12 +158,34 @@ internal class WsServerKtTest {
     class S1: WithAdapter()
 
     @Test
-    fun changePasswordTest() {
+    fun loginByPasswordTest() {
         embeddedServer(Netty, port = 8081, module = Application::testServerModule).start(wait = false)
 
         runBlocking {
             val client = Parsec3WSClient.withSession<S1>("ws://localhost:8081/api/p3")
 
+            val api = TestApiServer<WithAdapter>()
+            val slc = SuperloginClient<TestData, S1>(client)
+            assertEquals(LoginState.LoggedOut, slc.state.value)
+            var rt = slc.register("foo", "passwd", TestData("bar!"))
+            assertIs<Registration.Result.Success>(rt)
+            slc.logout()
+            assertNull(slc.loginByPassword("foo", "passwd2"))
+            var ar = slc.loginByPassword("foo", "passwd")
+            assertNotNull(ar)
+            assertEquals("bar!", ar.data?.foo)
+            assertTrue { slc.isLoggedIn }
+            assertEquals("foo", slc.call(api.loginName))
+        }
+    }
+
+    @Test
+    fun changePasswordTest() {
+        embeddedServer(Netty, port = 8083, module = Application::testServerModule).start(wait = false)
+
+        runBlocking {
+            val client = Parsec3WSClient.withSession<S1>("ws://localhost:8083/api/p3")
+
             val api = TestApiServer<WithAdapter>()
             val slc = SuperloginClient<TestData, S1>(client)
             assertEquals(LoginState.LoggedOut, slc.state.value)
@@ -197,7 +219,6 @@ internal class WsServerKtTest {
 
         }
     }
-
     @Test
     fun testExceptions() {
         embeddedServer(Netty, port = 8082, module = Application::testServerModule).start(wait = false)