title: Flask-principal tutorial (auth + authr)
body: <p>Anybody know of a good tutorial about flask-principal? I'm trying to do authentication and authorization (needRole and needIdentity) and I haven't gotten anywhere.</p>
  
  <p>I am almost sure there's no really comprehensive tutorial -- maybe some of you has some time on their hands and would like to post a tutorial-as-answer? I'm REALLY determined to use flask instead of django but need to fix this.</p>