bug(auth.error_message): should be i18n

spec/system/users/sign_in_spec.rb

@@ -0,0 +1,23 @@
+describe 'Sign in', js: true do
+  let(:user) { create(:user) }
+
+  scenario 'when a user is logged in english' do
+    visit root_path
+
+    within(".fr-header__tools") do
+      find('.fr-translate__btn').click
+    end
+    within("#translate") do
+      click_on("EN - English")
+    end
+    expect(page).to have_content("Sign in")
+    within(".fr-header__tools") do
+      click_on("Sign in")
+    end
+    expect(page).to have_content("With FranceConnect")
+    fill_in(:user_email, with: user.email)
+    fill_in(:user_password, with: 'wrong password')
+    click_on("Sign in")
+    expect(page).to have_content("Invalid Email or password.")
+  end
+end