Nested routes and database changes that are required

Basic home screen
Model and controller tests coming along

test/controllers/credentials_controller_test.rb

@@ -8,6 +8,7 @@ class CredentialsControllerTest < ActionDispatch::IntegrationTest
   test "should get index" do
     get credentials_url
     assert_response :success
+    assert_redirected_to new_user_session_path
   end
 
   test "should get new" do