fix: add possiblity to unset billing address

packages/medusa/src/api/routes/store/customers/update-customer.js

@@ -50,7 +50,7 @@ export default async (req, res) => {
   const id = req.user.customer_id
 
   const schema = Validator.object().keys({
-    billing_address: Validator.address().optional(),
+    billing_address: Validator.address().optional().allow(null),
     first_name: Validator.string().optional(),
     last_name: Validator.string().optional(),
     password: Validator.string().optional(),

packages/medusa/src/services/customer.js

@@ -387,8 +387,8 @@ class CustomerService extends BaseService {
         customer.email = this.validateEmail_(email)
       }
 
-      if (billing_address_id || billing_address) {
-        const address = update.billing_address_id || update.billing_address
+      if ("billing_address_id" in update || "billing_address" in update) {
+        const address = billing_address_id || billing_address
         await this.updateBillingAddress_(customer, address, addrRepo)
       }
 
@@ -417,6 +417,11 @@ class CustomerService extends BaseService {
    * @return {Promise} the result of the update operation
    */
   async updateBillingAddress_(customer, addressOrId, addrRepo) {
+    if (addressOrId === null) {
+      customer.billing_address_id = null
+      return
+    }
+
     if (typeof addressOrId === `string`) {
       addressOrId = await addrRepo.findOne({
         where: { id: addressOrId },