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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def user_getfield(self, field, access_token=None):
 """ Request a single field of information about the user. :param field: The name of the field requested. :type field: str :returns: The value of the field. Depending on the type, this may be a string, list, dict, or something else. :rtype: object .. versionadded:: 1.0 """

        info = self.user_getinfo([field], access_token)
        return info.get(field)