:00.0.0'      implementation 'com.google.firebase:firebase-core:00.0.0'      implementation 'com.google.firebase:firebase-database:00.0.0'      implementation 'com.google.firebase:firebase-auth:00.0.0'      testImplementation 'junit:junit:0.00'     androidTestImplementation 'com.android.support.test:runner:0.0.0'     androidTestImplementation 'com.android.support.test.espresso:espresso-core:0.0.0' 