<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def needs_repl_key(self):
 """ We need a repl key if you are auth + a cluster member + version is None or >= 2.0.0 """

        cluster = self.get_cluster()
        return (self.supports_repl_key() and
                cluster is not None and cluster.get_repl_key() is not None)