Lets MVVM MainActivity

class MainActivity : AppCompatActivity() {
    private val mBinding by viewBinding(ActivityMainBinding::inflate)
    private val mViewModel by viewModel<MainViewModel>()

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(mBinding.root)
        mBinding.viewModel = mViewModel

        mViewModel.fetchRandomQuoteLiveData.observe(this, Observer { // observing response from viewmodel
            mBinding.quote.text = "${it.quote} \n\n-${it.author} \n\nid:${it.quote_id}"
        })

        mViewModel.errorLiveData.observe(this, Observer { // observing exception message from viewmodel
            Toast.makeText(this, it, Toast.LENGTH_SHORT).show()
        })
    }
}