Return specified alias or if none the alias associated with the provided credentials.

        >>> clc.v2.Account.GetAlias()
        u'BTDI'

def GetAlias(session=None):
        """Return specified alias or if none the alias associated with the provided credentials.

        >>> clc.v2.Account.GetAlias()
        u'BTDI'
        """
        if session is not None:
            return session['alias']

        if not clc.ALIAS:  clc.v2.API._Login()
        return(clc.ALIAS)