title: firebase authentication error - "update google play services"
body: <p>I have project with Firebase from google. First I done simple chat activity - only sending messages with this database. Everything worked fine. But now I'd like to add another activity with authentication via email/password. In the same project on the same database and android emulator now I get message: </p>
  
  <blockquote>
    <p>"Update Google Play services : ChatApp won't run unless you update Google Play services"</p>
  </blockquote>
  
  <p>I looked around on both Google and StackOverflow past few hours and have found some information. However, I have not got it to work. </p>
  
  <p>I created Nexus 5X emulator with API 25 and Target: Android 7.1.1(Google APIs) x86 and second Nexus 6 with CPU/ABI x86_64. Google Play services on both are in version: 9.8.79 and I use auth in version 10.0.1. I try to create new emulators, I updated everything as <a href="https://stackoverflow.com/questions/38106075/firebase-auth-not-working-update-google-play-services-msg-on-the-emulator-a">here was said</a> I changed in Firebase settings ability to log via e-mail.</p>
  
  <p>Really makes me wonder why everything worked previously and now with authentication is not. </p>
  
  <p>I'm relatively inexperienced in Android development.</p>
  
  <p>Thanks in advance.</p>