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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 fetch_blob(cls, username, password, multifactor_password=None, client_id=None):
 """Just fetches the blob, could be used to store it locally"""

        session = fetcher.login(username, password, multifactor_password, client_id)
        blob = fetcher.fetch(session)
        fetcher.logout(session)

        return blob