diff --git a/src/main/scala/service/AccountService.scala b/src/main/scala/service/AccountService.scala
index 7979fa2..df71431 100644
--- a/src/main/scala/service/AccountService.scala
+++ b/src/main/scala/service/AccountService.scala
@@ -98,6 +98,9 @@
       isGroupAccount = false,
       isRemoved      = false)
 
+  /**
+   * Update the account by user name.
+   */
   def updateAccount(account: Account): Unit =
     Accounts
       .filter { a => a.userName is account.userName.bind }
@@ -113,6 +116,9 @@
         account.lastLoginDate,
         account.isRemoved)
 
+  /**
+   * Update the account by mail address
+   */
   def updateAccountByMailAddress(account: Account): Unit =
     Accounts
       .filter { a => a.mailAddress is account.mailAddress.bind }