diff --git a/app/src/main/java/com/stslex/aproselection/ui/MainActivity.kt b/app/src/main/java/com/stslex/aproselection/ui/MainActivity.kt
index 6a44d46..9a3d5cb 100644
--- a/app/src/main/java/com/stslex/aproselection/ui/MainActivity.kt
+++ b/app/src/main/java/com/stslex/aproselection/ui/MainActivity.kt
@@ -1,14 +1,35 @@
 package com.stslex.aproselection.ui
 
 import android.os.Bundle
+import android.util.Log
 import androidx.activity.ComponentActivity
 import androidx.activity.compose.setContent
+import androidx.lifecycle.lifecycleScope
+import com.stslex.aproselection.core.datastore.AppDataStore
+import com.stslex.aproselection.core.network.client.NetworkClient
 import com.stslex.aproselection.core.ui.theme.AppTheme
+import kotlinx.coroutines.flow.catch
+import kotlinx.coroutines.flow.launchIn
+import kotlinx.coroutines.flow.onEach
+import org.koin.android.ext.android.inject
 
 class MainActivity : ComponentActivity() {
 
+    val dataStore by inject<AppDataStore>()
+    val networkClient by inject<NetworkClient>()
+
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
+        dataStore.token
+            .catch {
+                Log.e(it.message, javaClass.simpleName, it)
+            }
+            .onEach {
+                if (it.isBlank()) {
+                    networkClient.regenerateToken()
+                }
+            }
+            .launchIn(lifecycleScope)
         setContent {
             AppTheme {
                 InitialApp()
diff --git a/core/network/src/main/java/com/stslex/aproselection/core/network/client/NetworkClient.kt b/core/network/src/main/java/com/stslex/aproselection/core/network/client/NetworkClient.kt
index a5b97db..83fedd9 100644
--- a/core/network/src/main/java/com/stslex/aproselection/core/network/client/NetworkClient.kt
+++ b/core/network/src/main/java/com/stslex/aproselection/core/network/client/NetworkClient.kt
@@ -7,4 +7,6 @@ interface NetworkClient {
     val client: HttpClient
 
     val apiClient: HttpClient
+
+    suspend fun regenerateToken()
 }
\ No newline at end of file
diff --git a/core/network/src/main/java/com/stslex/aproselection/core/network/client/NetworkClientImpl.kt b/core/network/src/main/java/com/stslex/aproselection/core/network/client/NetworkClientImpl.kt
index b7aa353..c10685f 100644
--- a/core/network/src/main/java/com/stslex/aproselection/core/network/client/NetworkClientImpl.kt
+++ b/core/network/src/main/java/com/stslex/aproselection/core/network/client/NetworkClientImpl.kt
@@ -16,9 +16,11 @@ import io.ktor.client.plugins.logging.Logger
 import io.ktor.client.plugins.logging.Logging
 import io.ktor.client.request.bearerAuth
 import io.ktor.client.request.get
+import io.ktor.http.ContentType
 import io.ktor.http.HttpStatusCode
 import io.ktor.http.URLProtocol
 import io.ktor.http.appendPathSegments
+import io.ktor.http.contentType
 import io.ktor.http.encodedPath
 import io.ktor.serialization.kotlinx.json.json
 import kotlinx.coroutines.CoroutineScope
@@ -98,13 +100,14 @@ class NetworkClientImpl(
                     headers.append("API_KEY", BuildConfig.API_KEY)
                     headers.append("DEVICE_ID", "test")
                     headers.append("uuid", uuid.value)
+                    contentType(ContentType.Application.Json)
                 }
                 bearerAuth(token = token.value)
             }
         }
 
-    private suspend fun regenerateToken() {
-        val token = client
+    override suspend fun regenerateToken() {
+        val token = apiClient
             .get {
                 url.appendPathSegments("token")
             }
diff --git a/core/network/src/main/java/com/stslex/aproselection/core/network/clients/auth/AuthNetworkClientImpl.kt b/core/network/src/main/java/com/stslex/aproselection/core/network/clients/auth/AuthNetworkClientImpl.kt
index 2fe126c..2ee7d23 100644
--- a/core/network/src/main/java/com/stslex/aproselection/core/network/clients/auth/AuthNetworkClientImpl.kt
+++ b/core/network/src/main/java/com/stslex/aproselection/core/network/clients/auth/AuthNetworkClientImpl.kt
@@ -6,6 +6,7 @@ import com.stslex.aproselection.core.network.clients.auth.model.UserAuthResponse
 import com.stslex.aproselection.core.network.clients.auth.model.UserAuthSendModel
 import io.ktor.client.call.body
 import io.ktor.client.request.get
+import io.ktor.client.request.post
 import io.ktor.client.request.setBody
 import io.ktor.http.appendPathSegments
 import kotlinx.coroutines.Dispatchers
@@ -35,9 +36,9 @@ class AuthNetworkClientImpl(
     ): Flow<UserAuthResponseModel> = flow {
         val result = networkClient
             .apiClient
-            .get {
+            .post {
                 url.appendPathSegments("passport/auth")
-                setBody(user)
+                setBody<UserAuthSendModel>(user)
             }
             .body<UserAuthResponseModel>()
         emit(result)
@@ -49,9 +50,9 @@ class AuthNetworkClientImpl(
     ): Flow<UserAuthResponseModel> = flow {
         val result = networkClient
             .apiClient
-            .get {
+            .post {
                 url.appendPathSegments("passport/register")
-                setBody(user)
+                setBody<UserAuthSendModel>(user)
             }
             .body<UserAuthResponseModel>()
         emit(result)
diff --git a/feature/auth/build.gradle.kts b/feature/auth/build.gradle.kts
index 4c98180..99a9ff4 100644
--- a/feature/auth/build.gradle.kts
+++ b/feature/auth/build.gradle.kts
@@ -5,6 +5,7 @@ plugins {
 
 dependencies {
     implementation(project(":core:ui"))
+    implementation(project(":core:datastore"))
     implementation(project(":core:network"))
 }
 
diff --git a/feature/auth/src/main/java/com/stslex/aproselection/feature/auth/data/model/AuthMapper.kt b/feature/auth/src/main/java/com/stslex/aproselection/feature/auth/data/model/AuthMapper.kt
new file mode 100644
index 0000000..bd9ba83
--- /dev/null
+++ b/feature/auth/src/main/java/com/stslex/aproselection/feature/auth/data/model/AuthMapper.kt
@@ -0,0 +1,12 @@
+package com.stslex.aproselection.feature.auth.data.model
+
+import com.stslex.aproselection.core.network.clients.auth.model.UserAuthResponseModel
+
+object AuthMapper {
+
+    fun UserAuthResponseModel.toData(): UserModel = UserModel(
+        uuid = uuid,
+        username = username,
+        nickname = nickname
+    )
+}
\ No newline at end of file
diff --git a/feature/auth/src/main/java/com/stslex/aproselection/feature/auth/data/model/UserModel.kt b/feature/auth/src/main/java/com/stslex/aproselection/feature/auth/data/model/UserModel.kt
new file mode 100644
index 0000000..3619855
--- /dev/null
+++ b/feature/auth/src/main/java/com/stslex/aproselection/feature/auth/data/model/UserModel.kt
@@ -0,0 +1,7 @@
+package com.stslex.aproselection.feature.auth.data.model
+
+data class UserModel(
+    val uuid: String,
+    val username: String,
+    val nickname: String,
+)
diff --git a/feature/auth/src/main/java/com/stslex/aproselection/feature/auth/data/repository/AuthRepository.kt b/feature/auth/src/main/java/com/stslex/aproselection/feature/auth/data/repository/AuthRepository.kt
index 5b77795..69942ef 100644
--- a/feature/auth/src/main/java/com/stslex/aproselection/feature/auth/data/repository/AuthRepository.kt
+++ b/feature/auth/src/main/java/com/stslex/aproselection/feature/auth/data/repository/AuthRepository.kt
@@ -1,8 +1,11 @@
 package com.stslex.aproselection.feature.auth.data.repository
 
+import com.stslex.aproselection.feature.auth.data.model.UserModel
 import kotlinx.coroutines.flow.Flow
 
 interface AuthRepository {
 
-    fun getHello(username: String): Flow<String>
+    fun auth(username: String, password: String): Flow<UserModel>
+
+    fun register(username: String, password: String): Flow<UserModel>
 }
\ No newline at end of file
diff --git a/feature/auth/src/main/java/com/stslex/aproselection/feature/auth/data/repository/AuthRepositoryImpl.kt b/feature/auth/src/main/java/com/stslex/aproselection/feature/auth/data/repository/AuthRepositoryImpl.kt
index 8760b92..a46d124 100644
--- a/feature/auth/src/main/java/com/stslex/aproselection/feature/auth/data/repository/AuthRepositoryImpl.kt
+++ b/feature/auth/src/main/java/com/stslex/aproselection/feature/auth/data/repository/AuthRepositoryImpl.kt
@@ -1,17 +1,45 @@
 package com.stslex.aproselection.feature.auth.data.repository
 
+import com.stslex.aproselection.core.datastore.AppDataStore
 import com.stslex.aproselection.core.network.clients.auth.AuthNetworkClient
+import com.stslex.aproselection.core.network.clients.auth.model.UserAuthSendModel
+import com.stslex.aproselection.feature.auth.data.model.AuthMapper.toData
+import com.stslex.aproselection.feature.auth.data.model.UserModel
 import kotlinx.coroutines.flow.Flow
-import kotlinx.coroutines.flow.flow
+import kotlinx.coroutines.flow.map
+import kotlinx.coroutines.flow.onEach
 
 class AuthRepositoryImpl(
-    private val networkClient: AuthNetworkClient
+    private val networkClient: AuthNetworkClient,
+    private val dataSource: AppDataStore
 ) : AuthRepository {
 
-    override fun getHello(username: String): Flow<String> = flow {
-        val helloResponse = networkClient
-            .getHello(username = username)
-            .text
-        emit(helloResponse)
-    }
+
+    override fun auth(
+        username: String,
+        password: String
+    ): Flow<UserModel> = networkClient.auth(
+        UserAuthSendModel(username, password)
+    )
+        .onEach { response ->
+            dataSource.setToken(response.token)
+            dataSource.setUuid(response.uuid)
+        }
+        .map { user ->
+            user.toData()
+        }
+
+    override fun register(
+        username: String,
+        password: String
+    ): Flow<UserModel> = networkClient.register(
+        UserAuthSendModel(username, password)
+    )
+        .onEach { response ->
+            dataSource.setToken(response.token)
+            dataSource.setUuid(response.uuid)
+        }
+        .map { user ->
+            user.toData()
+        }
 }
\ No newline at end of file
diff --git a/feature/auth/src/main/java/com/stslex/aproselection/feature/auth/domain/interactor/AuthInteractor.kt b/feature/auth/src/main/java/com/stslex/aproselection/feature/auth/domain/interactor/AuthInteractor.kt
index 0629d66..e5a2355 100644
--- a/feature/auth/src/main/java/com/stslex/aproselection/feature/auth/domain/interactor/AuthInteractor.kt
+++ b/feature/auth/src/main/java/com/stslex/aproselection/feature/auth/domain/interactor/AuthInteractor.kt
@@ -1,8 +1,11 @@
 package com.stslex.aproselection.feature.auth.domain.interactor
 
+import com.stslex.aproselection.feature.auth.data.model.UserModel
 import kotlinx.coroutines.flow.Flow
 
 interface AuthInteractor {
 
-    fun getHello(username: String): Flow<String>
+    fun auth(username: String, password: String): Flow<UserModel>
+
+    fun register(username: String, password: String): Flow<UserModel>
 }
\ No newline at end of file
diff --git a/feature/auth/src/main/java/com/stslex/aproselection/feature/auth/domain/interactor/AuthInteractorImpl.kt b/feature/auth/src/main/java/com/stslex/aproselection/feature/auth/domain/interactor/AuthInteractorImpl.kt
index d696509..e62839b 100644
--- a/feature/auth/src/main/java/com/stslex/aproselection/feature/auth/domain/interactor/AuthInteractorImpl.kt
+++ b/feature/auth/src/main/java/com/stslex/aproselection/feature/auth/domain/interactor/AuthInteractorImpl.kt
@@ -1,5 +1,6 @@
 package com.stslex.aproselection.feature.auth.domain.interactor
 
+import com.stslex.aproselection.feature.auth.data.model.UserModel
 import com.stslex.aproselection.feature.auth.data.repository.AuthRepository
 import kotlinx.coroutines.flow.Flow
 
@@ -7,9 +8,19 @@ class AuthInteractorImpl(
     private val repository: AuthRepository
 ) : AuthInteractor {
 
-    override fun getHello(
-        username: String
-    ): Flow<String> = repository.getHello(
-        username = username
+    override fun auth(
+        username: String,
+        password: String
+    ): Flow<UserModel> = repository.auth(
+        username = username,
+        password = password
+    )
+
+    override fun register(
+        username: String,
+        password: String
+    ): Flow<UserModel> = repository.register(
+        username = username,
+        password = password
     )
 }
\ No newline at end of file
diff --git a/feature/auth/src/main/java/com/stslex/aproselection/feature/auth/ui/AuthScreen.kt b/feature/auth/src/main/java/com/stslex/aproselection/feature/auth/ui/AuthScreen.kt
index 3c29bac..5da2af8 100644
--- a/feature/auth/src/main/java/com/stslex/aproselection/feature/auth/ui/AuthScreen.kt
+++ b/feature/auth/src/main/java/com/stslex/aproselection/feature/auth/ui/AuthScreen.kt
@@ -25,13 +25,17 @@ import com.stslex.aproselection.core.ui.navigation.NavigationScreen
 fun AuthScreen(
     text: String,
     navigate: (NavigationScreen) -> Unit,
-    setUsername: (String) -> Unit,
+    auth: (String, String) -> Unit,
     modifier: Modifier = Modifier,
 ) {
     var inputUsername by remember {
         mutableStateOf("")
     }
 
+    var inputPassword by remember {
+        mutableStateOf("")
+    }
+
     Box(
         modifier = modifier
             .fillMaxSize()
@@ -52,9 +56,19 @@ fun AuthScreen(
                 maxLines = 1,
             )
             Divider(Modifier.padding(16.dp))
+            TextField(
+                value = inputPassword,
+                onValueChange = { value ->
+                    if (inputPassword != value) {
+                        inputPassword = value
+                    }
+                },
+                maxLines = 1,
+            )
+            Divider(Modifier.padding(16.dp))
             ElevatedButton(
                 onClick = {
-                    setUsername(inputUsername)
+                    auth(inputUsername, inputPassword)
                     inputUsername = ""
                 }
             ) {
@@ -73,12 +87,12 @@ fun AuthScreen(
     }
 }
 
-@Preview(device = "id:pixel_6", showSystemUi = true, showBackground = true)
-@Composable
-fun AuthScreenPreview() {
-    AuthScreen(
-        text = "text",
-        navigate = {},
-        setUsername = {}
-    )
-}
\ No newline at end of file
+//@Preview(device = "id:pixel_6", showSystemUi = true, showBackground = true)
+//@Composable
+//fun AuthScreenPreview() {
+//    AuthScreen(
+//        text = "text",
+//        navigate = {},
+//        setUsername = {}
+//    )
+//}
\ No newline at end of file
diff --git a/feature/auth/src/main/java/com/stslex/aproselection/feature/auth/ui/AuthViewModel.kt b/feature/auth/src/main/java/com/stslex/aproselection/feature/auth/ui/AuthViewModel.kt
index 4fc3873..ecb9ab3 100644
--- a/feature/auth/src/main/java/com/stslex/aproselection/feature/auth/ui/AuthViewModel.kt
+++ b/feature/auth/src/main/java/com/stslex/aproselection/feature/auth/ui/AuthViewModel.kt
@@ -19,14 +19,20 @@ class AuthViewModel(
     val text: StateFlow<String>
         get() = _text.asStateFlow()
 
-    fun setUsername(username: String) {
+    fun auth(username: String, password: String) {
         _text.value = "..."
-        interactor.getHello(username)
+
+        interactor
+            .register(
+                username = username,
+                password = password
+            )
             .catch { throwable ->
+                _text.emit("Error: ${throwable.localizedMessage}")
                 handleError(throwable)
             }
-            .onEach { receivedText ->
-                _text.emit(receivedText)
+            .onEach { userModel ->
+                _text.emit("Success: uuid--${userModel.uuid}")
             }
             .launchIn(viewModelScope)
     }
diff --git a/feature/auth/src/main/java/com/stslex/aproselection/feature/auth/ui/navigation/AuthRouter.kt b/feature/auth/src/main/java/com/stslex/aproselection/feature/auth/ui/navigation/AuthRouter.kt
index 557bbd3..3273528 100644
--- a/feature/auth/src/main/java/com/stslex/aproselection/feature/auth/ui/navigation/AuthRouter.kt
+++ b/feature/auth/src/main/java/com/stslex/aproselection/feature/auth/ui/navigation/AuthRouter.kt
@@ -28,7 +28,7 @@ fun NavGraphBuilder.authRouter(
         AuthScreen(
             text = text,
             navigate = navigate,
-            setUsername = viewModel::setUsername,
+            auth = viewModel::auth,
             modifier = modifier
         )
     }