code: def create_user(self, username, password, roles):
      
      return users.create_user(self, username, password, roles)
docs: Create a user.
  
      @param username: Username
      @param password: Password
      @param roles: List of roles for the user. This should be [] for a
                    regular user, or ['ROLE_ADMIN'] for an admin.
      @return: An ApiUser object