How create a login API mobile?

[exploradatos]

Guys, sorry to be posting this here. I know that this is just for bugs that are presented in the repository but I'm really stagnat with a problem. This is my last attempt.

I'm trying to create a login API for a long time already and I'm not succeeding. I'm using yii2-starter-kit as my advanced application which already has the API implemented in the folder API. So far I don't know and can't connect the api with my mobile application so that only users that is authenticated to be able to call my API and see the results (this API will be used in an app made in android studio mobile).

I followed all the tutorials that you can find online but none of them worked for me. I'm sure that I am missing something because there is no way possible that I can't get this working. I'm really desperate. Please help me.

Does anyone has an instruction step by step of how to do it based on yii2-starter-kit ?