diff --git a/GoMoney/Service/AuthService.swift b/GoMoney/Service/AuthService.swift
index 0a77231..6e2b2b4 100644
--- a/GoMoney/Service/AuthService.swift
+++ b/GoMoney/Service/AuthService.swift
@@ -112,12 +112,12 @@ class AuthService {
 
         // remove setting
 
-        if let appDomain = Bundle.main.bundleIdentifier {
-            if let pref = UserDefaults(suiteName: "com.kappa.expense.settings") {
-                pref.removePersistentDomain(forName: appDomain)
-            }
+        let settingDomain = "com.kappa.expense.settings"
+        if let pref = UserDefaults(suiteName: settingDomain) {
+            pref.removePersistentDomain(forName: settingDomain)
         }
 
-        // TODO: remove realm
+        // remove realm
+        DataService.shared.dropAllTable()
     }
 }
diff --git a/GoMoney/Service/DataService.swift b/GoMoney/Service/DataService.swift
index 395bec6..2a80ec3 100644
--- a/GoMoney/Service/DataService.swift
+++ b/GoMoney/Service/DataService.swift
@@ -149,4 +149,14 @@ class DataService {
             .first(where: { $0._id.stringValue == id })
         completion?(transaction)
     }
+
+    func dropAllTable() {
+        do {
+            try realm.write {
+                realm.deleteAll()
+            }
+        } catch {
+            print("[dropAllTable] Error \(error)")
+        }
+    }
 }