Can my customers login to Repair Spots?

Yes.

Every Time you create a new customer you are creating a new profile for them to login to Repair Spots app. 

Note:
Make sure that if you want your customers to use this feature you include their email address on creation of the customer, they will then receive an email with instructions on how to login and access their customer features within Repair Spots.

See more on how customer login functionality works here.