feat(merchantapi): update the API

#### merchantapi:accounts_v1beta

The following keys were added:
- schemas.AddUser.description
- schemas.AddUser.id
- schemas.AddUser.properties.user.$ref
- schemas.AddUser.properties.user.description
- schemas.AddUser.properties.userId.description
- schemas.AddUser.properties.userId.type
- schemas.AddUser.type
- schemas.CreateAndConfigureAccountRequest.properties.user.description
- schemas.CreateAndConfigureAccountRequest.properties.user.items.$ref
- schemas.CreateAndConfigureAccountRequest.properties.user.type
- schemas.CreateAndConfigureAccountRequest.properties.users.deprecated

The following keys were changed:
- schemas.CreateAndConfigureAccountRequest.properties.users.description

Author: yoshi-automation

discovery/merchantapi-accounts_v1beta.json

@@ -1417,7 +1417,7 @@
       }
     }
   },
-  "revision": "20250115",
+  "revision": "20250125",
   "rootUrl": "https://merchantapi.googleapis.com/",
   "schemas": {
     "Accepted": {
@@ -1544,6 +1544,21 @@
       },
       "type": "object"
     },
+    "AddUser": {
+      "description": "Instruction for adding a user to the account during creation.",
+      "id": "AddUser",
+      "properties": {
+        "user": {
+          "$ref": "User",
+          "description": "Optional. Details about the user to be added. At the moment, only access rights may be specified."
+        },
+        "userId": {
+          "description": "Required. The email address of the user (for example, `[email protected]`).",
+          "type": "string"
+        }
+      },
+      "type": "object"
+    },
     "Address": {
       "description": "Shipping address of the warehouse.",
       "id": "Address",
@@ -1770,8 +1785,16 @@
           },
           "type": "array"
         },
-        "users": {
+        "user": {
           "description": "Optional. Users to be added to the account.",
+          "items": {
+            "$ref": "AddUser"
+          },
+          "type": "array"
+        },
+        "users": {
+          "deprecated": true,
+          "description": "Optional. Users to be added to the account. This field is deprecated and will not exist after the API evolves out of beta. Use the `user` field instead.",
           "items": {
             "$ref": "CreateUserRequest"
           },

src/apis/merchantapi/accounts_v1beta.ts

@@ -247,6 +247,19 @@ export namespace merchantapi_accounts_v1beta {
      */
     streetAddress?: string | null;
   }
+  /**
+   * Instruction for adding a user to the account during creation.
+   */
+  export interface Schema$AddUser {
+    /**
+     * Optional. Details about the user to be added. At the moment, only access rights may be specified.
+     */
+    user?: Schema$User;
+    /**
+     * Required. The email address of the user (for example, `[email protected]`).
+     */
+    userId?: string | null;
+  }
   /**
    * Collection of information related to the [autofeed](https://support.google.com/merchants/answer/7538732) settings.
    */
@@ -388,6 +401,10 @@ export namespace merchantapi_accounts_v1beta {
     /**
      * Optional. Users to be added to the account.
      */
+    user?: Schema$AddUser[];
+    /**
+     * Optional. Users to be added to the account. This field is deprecated and will not exist after the API evolves out of beta. Use the `user` field instead.
+     */
     users?: Schema$CreateUserRequest[];
   }
   /**