STEP 1: In Studio, go to Settings > Member Area > Website Integration > Login Form Integration:
On this page you'll see a number of steps, ignore these for now, but you'll need some of this information later.
STEP 2: In a new tab/browser, log in to your GoDaddy Website Builder. Select 'Pages', then choose the page you wish to add the login form to:
Select the 'Add Section' button:
Choose 'HTML':
Click on the HTML box on the page, then you should see a 'Custom Code' box on the right-hand side:
In this HTML box, copy/paste in the code under Step 1 in the Studio Login Form Integration:
Now you should see the 'Sign In Form' where your member can log in.
Click 'Done' to save the changes to this section.
Click 'Preview' to view the site or 'Publish' to make it live.