Example: Instagram

    [[NXOAuth2AccountStore sharedStore] setClientID:@"clientID"
                                             secret:@"clientSecret"
                                   authorizationURL:[NSURL URLWithString:@"https://api.instagram.com/oauth/authorize"]
                                           tokenURL:[NSURL URLWithString:@"https://api.instagram.com/oauth/access_token"]
                                        redirectURL:[NSURL URLWithString:@"myapp://instagram-callback"]
                                     forAccountType:@"Instagram"];