So, I saw some people where confused on the fact of what is a steam I'd and stuff. So some people hold back from submitting a their applications but they are a great asset that we need on the team. My suggestion is to add this below the steam ID section. https://steamid.io
For the record I've never used steamid.io for my investigations. shift-tab, player list, profile. Mark yourself as offline and voilà, steam64ID.
-1 for ease of access. People are quick to google, not so quick to think of offline mode in my experiences.
Go look up Daryl Dixon on steam and give me the steam64ID I need. There's a bazillion of them. The offline part would be for the sole purpose of getting your own ID.