Yes, share the file with Drive or Dropbox. Or whatever service you want to use. Then your friend needs to save the users.bin file in the DeepBot folder. The same way around applies to your friend, he needs to share his file with you, etc. Basically you're swapping the file between you two constantly. It's a pain, but it "should" work. Emphasis on should. Be sure to make backups before trying this.
This is not officially supported and I see files getting corrupted pretty easily.