You can upgrade or downgrade within the Customer Specific Pricing App, no additional code is required. To upgrade or downgrade, follow these steps:
- From "Shopify Admin", select Apps.
- Select Customer Pricing (Wholesale & VIP Pricing).
- Select Settings, then Account Plans.
- Select Downgrade or Upgrade.
- Select Approve charge.
- Select Accepted at ...
- Create a Customer Pricing Tag
- Create Product Groups
- Apply a Customer Pricing Tag to a Customer Account