It's time to create a simple Android app as a client that will retrieve the REST API from our base authentication server. First of all, we need to create an app from Android Studio and fill in your project name and the company domain. Don't forget to check Include Kotlin support. Here's a screenshot of the create application project window:

Select the minimum API version from the Phone and Tablet option. There's no need to add other options for this project. After clicking Next, you can select Empty Activity in the Add an Activity to Mobile window. After renaming the Activity Name and layout, click Finish. After building the gradle, you'll be ready to start creating an Android app.

Now, let's see how to implement the project's dependencies in Gradle.