def getExistingUserInfo(self):
        """
        Add a new user to C{self.database} and return its information.
        """
        self._counter += 1
        suffix = '_' + str(self._counter)
        username = 'username' + suffix
        password = 'password' + suffix
        lastChange = self._counter + 1
        min = self._counter + 2
        max = self._counter + 3
        warn = self._counter + 4
        inact = self._counter + 5
        expire = self._counter + 6
        flag = self._counter + 7

        self.database.addUser(username, password, lastChange, min, max, warn,
                              inact, expire, flag)
        return (username, password, lastChange, min, max, warn, inact,
                expire, flag)

        Add a new user to C{self.database} and return its information.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/python/test/test_fakepwd.py