fix(users): remove blank params from user form

Procfile.dev

@@ -1,3 +1,3 @@
-web: bin/rails server -p 3000 -b 0.0.0.0
+web: bin/rails server -p 3000
 css: bin/rails tailwindcss:watch
 worker: bundle exec good_job start

app/controllers/users_controller.rb

@@ -103,6 +103,9 @@ def unlock_achievements
   end
 
   def user_params
-    params.require(:user).permit(:accepted_coc, :aoc_id, :city_id, :entered_hardcore, :event_awareness, :favourite_language, :username)
+    params
+      .require(:user)
+      .permit(:accepted_coc, :aoc_id, :city_id, :entered_hardcore, :event_awareness, :favourite_language, :username)
+      .compact_blank
   end
 end

db/schema.rb

@@ -374,8 +374,8 @@
     t.bigint "city_id"
     t.datetime "created_at", null: false
     t.boolean "entered_hardcore", default: false, null: false
-    t.string "favourite_language"
     t.integer "event_awareness"
+    t.string "favourite_language"
     t.string "github_username"
     t.string "private_leaderboard"
     t.string "provider"