I have an interface which is passed to a viewmodel from an activity where its implemented. Then in the viewmodel, it calls the implemented interface method. Inside this method, all I want to do is display a Toast but I am getting null error trying to access the activity context. I do not understand why.
Just to be clear, inside all otber overridden method such as onCreate, onStop, OnResume, etc. If I display the toast, it works fine. Its only when inside this interface method, activity context seems to be null. I have absolutely no idea.

This is the hilt module

 @Module
      @InstallIn(SingletonComponent::class)
       abstract class ToastListenerModule {
       @Binds
        abstract fun bindToastMessageListener(activity: SplashActivity):                               ToastMessageListener
       }

My SplashActivity.kt

@AndroidEntryPoint


   class SplashActivity @Inject constructor()  : AppCompatActivity(),ToastMessageListener { private lateinit var binding: ActivitySplashBinding
@Inject
lateinit var auth: FirebaseAuth

override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    installSplashScreen() 
   binding = ActivitySplashBinding.inflate(layoutInflater)

    setContentView(binding.root)
}

override fun showToast(message: String) {
    //THIS IS WHERE THE PROBLEM IS WITH THE CONTEXT
    Toast.makeText(this,"MESSAGE", Toast.LENGTH_SHORT)
}

}
Below I have my ViewModel:
@HiltViewModel
class AuthenticationViewModel @Inject constructor(private val auth:FirebaseAuth, private val toastListner:ToastMessageListener): ViewModel() {

 val emailText = ObservableField<String>("")
 val passwordText = ObservableField<String>("")
 val nameText= ObservableField<String>("")

fun onSubmitClicked(isLogin:Boolean) {
    if(isLogin){
        val email = emailText.get()
        val password = passwordText.get()

        if (email.isNullOrEmpty() || password.isNullOrEmpty()) {
            println("Email or password is empty")
            return
        }
        auth.signInWithEmailAndPassword(emailText.get()?:"", passwordText.get()?:"")
            .addOnCompleteListener() { task ->
                if (task.isSuccessful) {
                    toastListner.showToast("Login Successful")
                } else {
                    val exception = task.exception
                     //THIS IS WHERE I CALL showToast
                     //AND YES IT IS GETTING CALLED AND EVERYTHING
                    toastListner.showToast("Login Failed: ${exception?.message}")
                    
                }
            }

    }else{
        println("SIGN Up BUTTON CLICKED ${emailText.get()} ${passwordText.get()}")

    }
}

fun isValidInput(): Boolean {
    val inputEm = emailText.get() ?: return false
    val inputPass = passwordText.get() ?: return false

    return inputEm.isNotEmpty() && inputPass.isNotEmpty()
}

}