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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 get_user(self, user_id):
 """Get user details of specified user. :param str user_id: the ID of the user to get (Required) :returns: the user object with details about the user. :rtype: User """

        api = self._get_api(iam.AccountAdminApi)
        return User(api.get_user(user_id))