The store owner can link their store through the Store Dashboard. 

Login URL:

https://yourwebsite.com/auth/login 

Dashboard > Stores > Add New Store

The created store will be automatically linked to the Store Owner.

Every new store added by the Store owner needs to be approved by the Admin before it is visible to the customers in the customer's application. 

Admin can view all the pending approval stores in Admin > Stores > Pending Approval Stores