Holy crap auth works (#2099)

* Holy crap auth works

* Fix some usages of UserID instead of UserName

* Refactor preferences.

They be non-async now. Also faster.

* Rename DbContext.

* Guest username assignment.

* Fix saving of profiles.

* Don't store data for guests.

* Fix generating invalid random colors.

* Don't allow dumb garbage for char preferences.

* Bans.

* Lol forgot to fill out the command description.

* Connection log.

* Rename all the tables and columns to be snake_case.

* Re-do migrations.

* Fixing tests and warnings.

* Update submodule

Content.Shared/Preferences/PlayerPreferences.cs

@@ -26,6 +26,11 @@ namespace Content.Shared.Preferences
         /// </summary>
         public IEnumerable<ICharacterProfile> Characters => _characters.AsEnumerable();
 
+        public ICharacterProfile GetProfile(int index)
+        {
+            return _characters[index];
+        }
+
         /// <summary>
         ///     Index of the currently selected character.
         /// </summary>