Gets a random user from the provider

        :returns: Dictionary

def get_random_user(self):
        """
        Gets a random user from the provider

        :returns: Dictionary
        """
        c = self.db.cursor()
        c.execute('''SELECT username, password, fullname FROM users
                     WHERE rowid >= (abs(random()) % (SELECT max(rowid) FROM users))
                     LIMIT 1''')
        r = c.fetchone()
        return {"username": r[0], "password": r[1], "fullname": r[2]}