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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 push(self, create=True, token=False):
 """Implmenets the `packer push` function UNTESTED! Must be used alongside an Atlas account """

        self.packer_cmd = self.packer.push

        self._add_opt('-create=true' if create else None)
        self._add_opt('-tokn={0}'.format(token) if token else None)
        self._add_opt(self.packerfile)

        return self.packer_cmd()