.AuthenticationViewModel .collect and .it problem - android-studio

Question

This is my project. This is AuthenticationViewModel part
the last .collect and = it code don't work. Please help me - where is the problem?
I can't find solution
package com.sondilek.presentation.Authentication
import androidx.compose.runtime.State
import androidx.compose.runtime.mutableStateOf
import androidx.lifecycle.ViewModel
import androidx.lifecycle.viewModelScope
import com.sondilek.domain.use_cases.AuthenticationUseCases
import com.sondilek.util.Response
import dagger.hilt.android.lifecycle.HiltViewModel
import kotlinx.coroutines.flow.collect
import kotlinx.coroutines.launch
import javax.inject.Inject
#HiltViewModel
class AuthenticationViewModel #Inject constructor(
private val authUseCases : AuthenticationUseCases
) : ViewModel(){
val isUserAuthenticated get() = authUseCases.isUserAuthenticated()
private val _signInState = mutableStateOf<Response<Boolean>>(Response.Success(false))
val signInState : State<Response<Boolean>> = _signInState
private val _signUpState = mutableStateOf<Response<Boolean>>(Response.Success(false))
val signUpState : State<Response<Boolean>> = _signUpState
private val _signOutState = mutableStateOf<Response<Boolean>>(Response.Success(false))
val signOutState : State<Response<Boolean>> = _signOutState
private val _firebaseAuthState = mutableStateOf<Boolean>(false)
val firebaseAuthState : State<Boolean> = _firebaseAuthState
fun signOut(){
viewModelScope.launch {
authUseCases.firebaseSignOut().collect{
_signOutState.value = it
if(it==Response.Success(true)){
_signInState.value = Response.Success(false)
}
}
}
}
fun signIn(email:String,password:String){
viewModelScope.launch {
authUseCases.firebaseSignIn(email = email, password = password).collect{
_signInState.value = it
}
}
}
fun signUp(email:String,password:String,username:String){
viewModelScope.launch {
authUseCases.firebaseSignUp(email = email, password = password, userName = username)
.collect{
_signUpState.value = it
}
}
}
fun getFirebaseAuthState(){
viewModelScope.launch {
authUseCases.firebaseAuthState().collect {
_firebaseAuthState.value = it
}
}
}
}