     
     func loadFromFirebase(
         userId:String,
-        fireBase:FDatabase,
+        firebase:FDatabase,
         users:FDatabaseUsers,
         completion:@escaping((FDatabaseUsersItem) -> ()))
     {
-        fireBase.load(
+        firebase.load(
             parent:users,
             identifier:userId)
         { [weak self] (user:FDatabaseUsersItem?) in

            return
        }
        
        let userId:String = fireBase.create(
            parent:users,
            data:userJson)
        user.identifier = userId

    
    private func sync(
        userId:String?,
        firebase:FDatabase,
        users:FDatabaseUsers,
        completion:@escaping((FDatabaseUsersItem) -> ()))
    {
