title: PasswordType not supported in Postgres
body: <p>In SQLAlchemy, when I try to query for user by 
  <code>request.db.query(models.User.password).filter(models.User.email == email).first()</code></p>
  
  <p>Of course it works with different DB (SQLite3).
  The source of the problem is, that the password is 
  <code>sqlalchemy.Column(sqlalchemy_utils.types.passwordPasswordType(schemes=['pbkdf2_sha512']), nullable=False)</code></p>
  
  <p>I really don't know how to solve it</p>
  
  <p>I'm using <code>psycopg2</code></p>