https://xxxxxx.arcgis.com/sharing/rest/content/items/c27d947c8e15477c8ca754104eb1c2a6/data?token=0_X1Gpzz-18KEQNUvDUtmRPTFfqdk29RTT0MCNfiHMLnPcDIPF3rF2wL0o0AwoMDSmP5KLzmzr4PflQJXdEAb9xE_NCfpb4804aNoU5mVe_z
The URL you provided in your first post contains a security token. These tokens expire. Just remove the token from the URL, and the system should authenticate off your current signed in account.