No matching client found for package name 'com.example.myapp '

This is a part of my google-services.json:

  "client": [
    {
      "client_info": {
        "mobilesdk_app_id": "1:870942488540:android:61cde8f21dabd0d2844119",
        "android_client_info": {
          "package_name": "com.firebase.uidemo"
        }
      },

and build output shows: Execution failed for task ':app:processDebugGoogleServices'.

No matching client found for package name 'com.firebase.uidemo'

how could I fix the problem? Hope someone could tell me, appreciate your help!