What Application Permission Model do I need if I want users of my App invite friends to join to play?


hello , I am a developer of BeamGo, now I would like my users login the App with his/her own twitter account and invite friends to use this App if he/she think this App is good enough, so what kind of Application Permission Model do I need to add this feature? I tried to change the permission from read only to read & write, but failed to add my phone to my twitter account, then I tried to text to the long code, but failed again, so is there anyone who can help me out? Thanks in advance!