docs: edits and fixes to commerce module docs (#7468)

Apply edits and fixes to the commerce modules docs

www/apps/resources/app/commerce-modules/user/page.mdx

@@ -8,8 +8,6 @@ export const metadata = {
 
 The User Module is the `@medusajs/user` NPM package that provides user-related features in your Medusa and Node.js applications.
 
----
-
 ## Features
 
 ### User Management
@@ -41,15 +39,19 @@ await userModuleService.refreshInviteTokens([invite.id])
 
 ## Configure User Module
 
-After installing the `@medusajs/user` package in your Medusa application, add it to the `modules` object in `medusa-config.js`:
+To use the User Module, enable it in the `modules` object in `medusa-config.js`:
 
 ```js title="medusa-config.js"
+const { Modules } = require("@medusajs/modules-sdk")
+
+// ...
+
 const modules = {
   // ...
-  user: {
+  [Modules.USER]: {
     resolve: "@medusajs/user",
     options: {
-      jwt_secret: process.env.JWT_SECRET,
+      jwt_secret: process.env.JWT_SECRET ?? "supersecret",
     },
   },
 }
@@ -114,11 +116,14 @@ For example:
   import { IUserModuleService } from "@medusajs/types"
   import { ModuleRegistrationName } from "@medusajs/modules-sdk"
 
-  const step1 = createStep("step-1", async (_, context) => {
+  const step1 = createStep(
+    "step-1", 
+    async (_, { container }) => {
     const userModuleService: IUserModuleService =
-      context.container.resolve(
+      container.resolve(
         ModuleRegistrationName.USER
       )
+      
     const users = await userModuleService.list()
   })
   ```