A presenter, as we saw in Chapter 3, Implementing Tetris Logic and Functionality, is the middleman between a view and a model. It is necessary to create suitable presenters for views to properly facilitate clean view-model interactions. Creating a presenter is fairly easy. We need to first create an interface that properly declares the behaviors that will be exhibited by the presenter. Create a LoginPresenter interface in the login package with the following code:
package com.example.messenger.ui.logininterface LoginPresenter { fun executeLogin(username: String, password: String)}
As can be easily seen in the preceding code snippet, we want a class that acts as a LoginPresenter for a LoginView to possess an
