SyncMadeEasy/force-app/main/default/classes/UpdateCollectionAndCollectAuthentication.cls

@RestResource(urlMapping='/UpdateCollectionAndCollectAuthentication/*')
global with sharing class UpdateCollectionAndCollectAuthentication {
  
    @HttpPost
    global static void updateCollectionAndCollectsWithAuthentication(){     
           //Deprecated
       //Class no longer exists   
    }    
}