diff --git a/app/src/main/java/ru/myitschool/work/ui/BookingEntity.kt b/app/src/main/java/ru/myitschool/work/ui/BookingEntity.kt
new file mode 100644
index 0000000..f97a31e
--- /dev/null
+++ b/app/src/main/java/ru/myitschool/work/ui/BookingEntity.kt
@@ -0,0 +1,7 @@
+package ru.myitschool.work.domain.entities
+
+// ДАННЫЙ КЛАСС ЗАПРЕЩЕНО МОДИЦИФИРОВАТЬ! ПРИ ТЕСТИРОВАНИИ ОН БУДЕТ ВОЗВРАЩЁН В ОРИГИНАЛЬНОЕ ЗНАЧЕНИЕ
+data class BookingEntity(
+    val roomName: String,
+    val time: String,
+)
\ No newline at end of file
diff --git a/app/src/main/java/ru/myitschool/work/ui/screen/UserEntity.kt b/app/src/main/java/ru/myitschool/work/ui/screen/UserEntity.kt
new file mode 100644
index 0000000..126c1c8
--- /dev/null
+++ b/app/src/main/java/ru/myitschool/work/ui/screen/UserEntity.kt
@@ -0,0 +1,7 @@
+package ru.myitschool.work.domain.entities
+
+// ДАННЫЙ КЛАСС ЗАПРЕЩЕНО МОДИЦИФИРОВАТЬ! ПРИ ТЕСТИРОВАНИИ ОН БУДЕТ ВОЗВРАЩЁН В ОРИГИНАЛЬНОЕ ЗНАЧЕНИЕ
+data class UserEntity(
+    val name: String,
+    val bookingList: List<BookingEntity>
+)
\ No newline at end of file
diff --git a/app/src/main/java/ru/myitschool/work/ui/screen/auth/AuthScreen.kt b/app/src/main/java/ru/myitschool/work/ui/screen/auth/AuthScreen.kt
index f99978e..a1be2de 100644
--- a/app/src/main/java/ru/myitschool/work/ui/screen/auth/AuthScreen.kt
+++ b/app/src/main/java/ru/myitschool/work/ui/screen/auth/AuthScreen.kt
@@ -21,7 +21,6 @@ import androidx.compose.runtime.remember
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
-import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.platform.testTag
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.text.style.TextAlign
@@ -64,6 +63,8 @@ fun AuthScreen(
                     modifier = Modifier.size(64.dp)
                 )
             }
+
+            else -> {}
         }
     }
 }
@@ -74,6 +75,12 @@ private fun Content(
     state: AuthState.Data
 ) {
     var inputText by remember { mutableStateOf("") }
+
+    // валидация
+    val isValidCode = inputText.length != 4 && inputText.isNotEmpty() && inputText.none { it.isWhitespace() } && inputText.all { ch ->
+        ch in '0'..'9' || ch in 'A'..'Z' || ch in 'a'..'z'
+    }
+
     Spacer(modifier = Modifier.size(16.dp))
     TextField(
         modifier = Modifier.testTag(TestIds.Auth.CODE_INPUT).fillMaxWidth(),
@@ -90,7 +97,7 @@ private fun Content(
         onClick = {
             viewModel.onIntent(AuthIntent.Send(inputText))
         },
-        enabled = true
+        enabled = isValidCode
     ) {
         Text(stringResource(R.string.auth_sign_in))
     }
diff --git a/app/src/main/java/ru/myitschool/work/ui/screen/auth/AuthState.kt b/app/src/main/java/ru/myitschool/work/ui/screen/auth/AuthState.kt
index a06ba76..84aa7e3 100644
--- a/app/src/main/java/ru/myitschool/work/ui/screen/auth/AuthState.kt
+++ b/app/src/main/java/ru/myitschool/work/ui/screen/auth/AuthState.kt
@@ -3,4 +3,5 @@ package ru.myitschool.work.ui.screen.auth
 sealed interface AuthState {
     object Loading: AuthState
     object Data: AuthState
+    object Error: AuthState
 }
\ No newline at end of file
diff --git a/app/src/main/java/ru/myitschool/work/ui/screen/auth/AuthViewModel.kt b/app/src/main/java/ru/myitschool/work/ui/screen/auth/AuthViewModel.kt
index 3153640..3f081e5 100644
--- a/app/src/main/java/ru/myitschool/work/ui/screen/auth/AuthViewModel.kt
+++ b/app/src/main/java/ru/myitschool/work/ui/screen/auth/AuthViewModel.kt
@@ -28,11 +28,11 @@ class AuthViewModel : ViewModel() {
                     _uiState.update { AuthState.Loading }
                     checkAndSaveAuthCodeUseCase.invoke("9999").fold(
                         onSuccess = {
-                            _actionFlow.emit(Unit)
+                            _actionFlow.emit(Unit)// переход на MainScreen
                         },
                         onFailure = { error ->
                             error.printStackTrace()
-                            _actionFlow.emit(Unit)
+                            _actionFlow.emit(Unit)// переход на MainScreen при ошибке
                         }
                     )
                 }