* Validate ids in constructors. * Remove redundant `.value` usage in string interpolation. * Make a distinction between `SessionId` and `UserId` in `TestData`.
Firebase
Configuration
In order to make this module only know about Firebase, the plugin com.google.gms.google-services has been disabled from the app module.
To be able to change the values in the file firebase.xml from this module, you should enable the plugin com.google.gms.google-services again, copy the file google-services.json to the folder /app/src/main, build the project, and check the generated file app/build/generated/res/google-services/<buildtype>/values/values.xml to import the generated values into the firebase.xml files.