Dear Niten,
Referring to the post
https://community.arubanetworks.com/t5/Controllerless-Networks/WiFi-Uplink-feature-with-Instant-8-5/td-p/534619
It highlights the process. Please see the snapshot of the command, this should be the mac address of your AP which the hotel should whitelist.
sh wifi-uplink auth
---------------------------------------------------------------------- wifi uplink auth log: ---------------------------------------------------------------------- [5853]1556294443.043244: wpa_supplicant v2.6 [5853]1556294443.043369: random: Trying to read entropy from /dev/random [5853]1556294443.043463: Successfully initialized wpa_supplicant [5853]1556294489.360465: Priority group 1 [5853]1556294489.360527: id=0 ssid='SG9' [5853]1556294489.360652: Add interface aruba101 to a new radio N/A [5853]1556294489.360777: aruba101: Own MAC address: c8:b5:ad:3c:ae:21 [5853]1556294489.360840: aruba_driver_set_key 0x5f1484 0x5f153c [5853]1556294489.360933: set key: alg 0 key_id 0 tx 0 addr (nil) seq_len 0 key_len 0 [5853]1556294489.361027: aruba_driver_set_key 0x5f1484 0x5f153c [5853]1556294489.361121: set key: alg 0 key_id 1 tx 0 addr (nil) seq_len 0 key_len 0 [5853]1556294489.361214: aruba_driver_set_key 0x5f1484 0x5f153c [5853]1556294489.361277: set key: alg 0 key_id 2 tx 0 addr (nil) seq_len 0 key_len 0 [5853]1556294489.361402: aruba_driver_set_key 0x5f1484 0x5f153c [5853]1556294489.361464: set key: alg 0 key_id 3 tx 0 addr (nil) seq_len 0 key_len 0 [5853]1556294489.361558: aruba101: RSN: flushing PMKID list in the driver