use port instead of network name

Author: manishdait

src/hiero_sdk_python/client/client.py

@@ -53,10 +53,9 @@ def _init_mirror_stub(self) -> None:
         We now use self.network.get_mirror_address() for a configurable mirror address.
         """
         mirror_address = self.network.get_mirror_address()
-        if self.network in ('mainnet', 'testnet', 'previewnet'):
+        if mirror_address.endswith(':50212') or mirror_address.endswith(':443'):
             self.mirror_channel = grpc.secure_channel(mirror_address, grpc.ssl_channel_credentials())
         else:
-            print(mirror_address)
             self.mirror_channel = grpc.insecure_channel(mirror_address)
         self.mirror_stub = mirror_consensus_grpc.ConsensusServiceStub(self.mirror_channel)