def __init__(self, account_name=None, account_key=None, sas_token=None, is_emulated=None):
self.account_name = account_name<EOL>self.account_key = account_key<EOL>self.sas_token = sas_token<EOL>self.is_emulated = is_emulated<EOL>
:param str account_name:
    The storage account name. This is used to authenticate requests 
    signed with an account key and to construct the storage endpoint. It 
    is required unless is_emulated is used.
:param str account_key:
    The storage account key. This is used for shared key authentication. 
:param str sas_token:
     A shared access signature token to use to authenticate requests 
     instead of the account key. If account key and sas token are both 
     specified, account key will be used to sign.
:param bool is_emulated:
    Whether to use the emulator. Defaults to False. If specified, will 
    override all other parameters.