title: Can we add Twitter permissions on demand in an iOS app?
body: <p>We are making an iOS app that has two points of integration with Twitter:
  1. User can use Twitter account to login (or FB account or just email/password)
  2. User can share his freshly done work to twitter (just post a tweet)</p>
  
  <p>So for some users we need a read/write access to twitter, but for some only minimal permission for loggin in would be enough and I wouldn't like to scare users away by asking for a write permission on the first login, when they might not even realize the app can share their work to Twitter.</p>
  
  <p>Is it somehow possible to request only login permissions on first start and tweeting permission only on a first Tweeting need?</p>
  
  <p>P.S.
  We are not going to use the built-in iOS sharing sheets, because they are good only for sharing to <em>either</em> FB OR Twitter OR elsewhere. We want to offer sharing to Twitter, Facebook, Email and maybe somewhere else simultaneously, in a foursquare app style</p>