Updated iOS Quickstart to use getCurrentAccount API for silent token acquisition

Author: oldalton

articles/active-directory/develop/quickstart-v2-ios.md

@@ -267,16 +267,21 @@ self.applicationContext!.acquireToken(with: parameters) { (result, error) in /*
 Apps shouldn't require their users to sign in every time they request a token. If the user has already signed in, this method allows apps to request tokens silently. 
 
 ```swift
-guard let account = try self.applicationContext!.allAccounts().first else { return }
-        
-let silentParams = MSALSilentTokenParameters(scopes: kScopes, account: account)
-self.applicationContext!.acquireTokenSilent(with: silentParams) { (result, error) in /* Add your handling logic */}
+self.applicationContext!.getCurrentAccount(with: nil) { (currentAccount, previousAccount, error) in
+            
+   guard let account = currentAccount else {
+      return
+   }
+            
+   let silentParams = MSALSilentTokenParameters(scopes: self.kScopes, account: account)
+   self.applicationContext!.acquireTokenSilent(with: silentParams) { (result, error) in /* Add your handling logic */}
+}
 ```
 
 > |Where: ||
 > |---------|---------|
 > | `scopes` | Contains the scopes being requested (that is, `[ "user.read" ]` for Microsoft Graph or `[ "<Application ID URL>/scope" ]` for custom Web APIs (`api://<Application ID>/access_as_user`) |
-> | `account` | The account a token is being requested for. This quickstart is about a single account application. If you want to build a multi-account app you'll need to define logic to identify which account to use for token requests using `applicationContext.account(forHomeAccountId: self.homeAccountId)` |
+> | `account` | The account a token is being requested for. This quickstart is about a single account application. If you want to build a multi-account app you'll need to define logic to identify which account to use for token requests using `accountsFromDeviceForParameters:completionBlock:` and passing correct `accountIdentifier` |
 
 ## Next steps