You don't need to pre-define a Twitter account.
You should use the App Only mode.
You just need a couple of lines with STTwitter:
STTwitterAPI *twitter = [STTwitterAPI twitterAPIAppOnlyWithConsumerKey:@""
consumerSecret:@""];
[twitter verifyCredentialsWithSuccessBlock:^(NSString *bearerToken) {
[twitter getUserTimelineWithScreenName:@"nike"
successBlock:^(NSArray *statuses) {
// ...
} errorBlock:^(NSError *error) {
// ...
}];
} errorBlock:^(NSError *error) {
// ...
}];
Then, when you get the statuses, fill your tableView's dataSource with them, and reload the table.