GoDaddy Delegate Access
If your domain name(s) are registered with GoDaddy and you want to continue managing your domains yourself, there is a way to provide Spirelight with "Delegate Access" to your account, without actually transferring the domains.
Make sure you're logged into your GoDaddy account first, then follow this link to grant delegate access:
https://sso.godaddy.com/v1/access
From there, you'll need to click the button that says "Invite To Access"
Then, you should fill in the following fields as shown:
For "Access Level" they should choose "Domains & Products" like this:
Finally, click the "Invite" button like this: