customer

var (
	// ErrCustomerNotFound is returned when a customer is not found.
	ErrCustomerNotFound = errors.New("the customer was not found in the repository")
	// ErrCustomerAlreadyExists is returned when should not change an existing customer.
	ErrCustomerAlreadyExists = errors.New("the customer already exists in the repository")
	// ErrFailedToAddCustomer is returned when the customer could not be added to the repository.
	ErrFailedToAddCustomer = errors.New("failed to add the customer to the repository")
	// ErrUpdateCustomer is returned when the customer could not be updated in the repository.
	ErrUpdateCustomer = errors.New("failed to update the customer in the repository")
)