I'm using the following code to get access to a user's twitter account:

```
ACAccountStore *store = [[ACAccountStore alloc] init];
ACAccountType *twitterAccountType = 
[store accountTypeWithAccountTypeIdentifier:ACAccountTypeIdentifierTwitter];

//  Request access from the user for access to his Twitter accounts
[store requestAccessToAccountsWithType:twitterAccountType 
                 withCompletionHandler:^(BOOL granted, NSError *error) {
                     if (!granted) {
                         NSLog(@"User rejected access to his account.");
                     } 
                     else {
                         NSArray *arrayOfAccounts = [store accountsWithAccountType:twitterAccountType];
                         if ([arrayOfAccounts count] > 0)  {
                             ACAccount *acct = [arrayOfAccounts objectAtIndex:0];
                         }
}];

```

My question is, how do I save the user's account in between app sessions? For the current session I can store it in an instance variable, but if the user exits the app and comes back, how do I get that account? Do I have call `[store requestAccessToAccountsWithType:twitterAccountType...]`? every time?