The addiscsistorageport command configures a session between an initiator port and target IP addresses for a target iSCSI Qualified Name (IQN). If you run the command again for the same target parameters, it returns successfully without initiating any action as the sessions was established after the first invocation. However, if you retry the command with a different username argument, chapsecret argument, or both, then the command fails because the initiator cannot verify which credentials are correct.