Hi, where can i change tk.key in Training_05_ble_secutity_example? the truct type security_configuration in SDK 5.0.4 does not have the "tk" field. And when i debug the example without any changes and use Light Blue app( to scan the device), I don't see the device. Can you tell me why the code does not run corectly(Must I change the code before debug the program?) and where can i change the tk.key and csrk.key?