If you already have WiX site in works then here are steps how to
Add me as a Contributor to your site
You've to got add me with full administrative power and ability to PUBLISH YOUR SITE or I won't be able to open your Editor and make all necessary changes.
Be assured that I do not have the authority to see your billing information, and neither can I delete or transfer your site to a different owner.
Step 1: Log in to your Wix account
Go to Wix.com and click "Sign In" at the top right.
If you have more than one site, select "Manage Site" for the site you wish to send the invite from
Step 2: Go to your dashboard
Hower over the thumbnail of the site you want to be worked on and click on "Select & Edit Site"
Step 3: Add me as a contributor
Inside your Back Office Settings hower over "Site Actions" and
scroll down until you see Add Contributor. Click "Add Contributor".
Step 4: Add my Email
Enter my Wix Expert email address email@example.com, Choose the role you are assigning for me and yhen Click Send Invite
Step 5: Send the Invite
You’ve now successfully invited me to join your Wix website! Once I receive the email notification from Wix, I will accept the invitation. Once, I have accepted, the contributor screen will change to show I have been added.