Fix broken multiuser mode setup (no autologin)

app/controllers/users/sessions_controller.rb

@@ -34,8 +34,9 @@ def destroy
   def auto_login_single_user
     # Autocreate an admin user if there isn't one
     create_admin_user if User.with_role(:administrator).empty?
-    # If in single user mode, automatically log in with an admin account
-    unless Flipper.enabled?(:multiuser)
+    # If in single user mode, or on first run,
+    # automatically log in with an admin account
+    if !Flipper.enabled?(:multiuser) || User.with_role(:administrator).first.reset_password_token == "first_use"
       sign_in(:user, User.with_role(:administrator).first)
       flash.discard
       redirect_back_or_to root_path, alert: nil

spec/requests/users/sessions_spec.rb

@@ -6,7 +6,7 @@
 
 RSpec.describe "Users::Sessions" do
   context "when in multiuser mode", :multiuser do
-    context "when signed out" do
+    context "when signed out on first use" do
       describe "GET /users/sign_in" do
         it "creates a default account" do
           expect { get "/users/sign_in" }.to change(User, :count).from(0).to(1)
@@ -17,6 +17,21 @@
           expect(User.first.is_administrator?).to be true
         end
 
+        it "automatically logs in on first use" do
+          get "/users/sign_in"
+          expect(controller.current_user).to be_present
+        end
+      end
+    end
+
+    context "when signed out after first use" do
+      describe "GET /users/sign_in" do
+        let(:admin) { create(:admin) }
+
+        before do
+          admin.update(reset_password_token: nil)
+        end
+
         it "doesn't auto log in" do
           get "/users/sign_in"
           expect(controller.current_user).to be_nil