LoginActivity.kt

import kotlinx.android.synthetic.main.content_main.*

class LoginActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        // No need to call findViewById(R.id.textView) as TextView
        userName.text = "temidayo"

    }
}