Add realtime database to the APP.

app/proguard-rules.pro

@@ -21,9 +21,18 @@
 -renamesourcefileattribute SourceFile
 
 ## --------------- GOOGLE API ---------------
-
 -keepclassmembers class * {
   @com.google.api.client.util.Key <fields>;
 }
 -keep class com.google.api.services.sheets.** { *; }
--keep class com.fasterxml.** { *; }
+-keep class com.fasterxml.** { *; }
+
+## --------------- Firebase RealTime Database ---------------
+
+ # Add this global rule
+-keepattributes Signature
+
+# This rule will properly ProGuard all the model classes in
+# the package com.yourcompany.models.
+# Modify this rule to fit the structure of your app.
+-keepclassmembers class com.pixelized.rplexicon.model.CharacterSheetFire.** { *; }