It used to be fairly easy to find things in Windows 7, but after 8, Microsoft decided to start hiding system settings under oddly generic menu headings. This has become a tradition now in Windows 10, which makes it somewhat difficult to find the correct user settings to automatically log into Windows.
The easiest way, of course, is to ask Cortana. Type “netplwiz” into the search bar. This will bring up the list of accounts on the computer. Highlight your account (or, if you’re like me and the only user, the Administrator account) and uncheck the box next to “Users must enter a user name and password to use this computer”.
Upon restart, you should no longer be prompted for a password with that beautiful Pacific beach scene. Oh, well.