feat(merchantapi): update the api

#### merchantapi:accounts_v1

The following keys were added:
- resources.accounts.methods.getAccountForGcpRegistration (Total Keys: 7)
- schemas.GetAccountForGcpRegistrationResponse (Total Keys: 3)

#### merchantapi:accounts_v1beta

The following keys were added:
- resources.accounts.methods.getAccountForGcpRegistration (Total Keys: 7)
- schemas.GetAccountForGcpRegistrationResponse (Total Keys: 3)

Author: yoshi-automation

docs/dyn/merchantapi_accounts_v1.accounts.html

@@ -176,6 +176,9 @@ <h2>Instance Methods</h2>
 <p class="toc_element">
   <code><a href="#get">get(name, x__xgafv=None)</a></code></p>
 <p class="firstline">Retrieves an account from your Merchant Center account. After inserting, updating, or deleting an account, it may take several minutes before changes take effect.</p>
+<p class="toc_element">
+  <code><a href="#getAccountForGcpRegistration">getAccountForGcpRegistration(x__xgafv=None)</a></code></p>
+<p class="firstline">Retrieves the merchant account that the calling GCP is registered with.</p>
 <p class="toc_element">
   <code><a href="#list">list(filter=None, pageSize=None, pageToken=None, x__xgafv=None)</a></code></p>
 <p class="firstline">Note: For the `accounts.list` method, quota and limits usage are charged for each user, and not for the Merchant Center ID or the advanced account ID. To list several sub-accounts, you should use the `accounts.listSubaccounts` method, which is more suitable for advanced accounts use case.</p>
@@ -308,6 +311,24 @@ <h3>Method Details</h3>
 }</pre>
 </div>
 
+<div class="method">
+    <code class="details" id="getAccountForGcpRegistration">getAccountForGcpRegistration(x__xgafv=None)</code>
+  <pre>Retrieves the merchant account that the calling GCP is registered with.
+
+Args:
+  x__xgafv: string, V1 error format.
+    Allowed values
+      1 - v1 error format
+      2 - v2 error format
+
+Returns:
+  An object of the form:
+
+    { # Response message for the GetAccountForGcpRegistration method.
+  &quot;name&quot;: &quot;A String&quot;, # The name of the merchant account id that the GCP is registered with.
+}</pre>
+</div>
+
 <div class="method">
     <code class="details" id="list">list(filter=None, pageSize=None, pageToken=None, x__xgafv=None)</code>
   <pre>Note: For the `accounts.list` method, quota and limits usage are charged for each user, and not for the Merchant Center ID or the advanced account ID. To list several sub-accounts, you should use the `accounts.listSubaccounts` method, which is more suitable for advanced accounts use case.

docs/dyn/merchantapi_accounts_v1beta.accounts.html

@@ -176,6 +176,9 @@ <h2>Instance Methods</h2>
 <p class="toc_element">
   <code><a href="#get">get(name, x__xgafv=None)</a></code></p>
 <p class="firstline">Retrieves an account from your Merchant Center account. After inserting, updating, or deleting an account, it may take several minutes before changes take effect.</p>
+<p class="toc_element">
+  <code><a href="#getAccountForGcpRegistration">getAccountForGcpRegistration(x__xgafv=None)</a></code></p>
+<p class="firstline">Retrieves the merchant account that the calling GCP is registered with.</p>
 <p class="toc_element">
   <code><a href="#list">list(filter=None, pageSize=None, pageToken=None, x__xgafv=None)</a></code></p>
 <p class="firstline">Note: For the `accounts.list` method, quota and limits usage are charged for each user, and not for the Merchant Center ID or the advanced account ID. To list several sub-accounts, you should use the `accounts.listSubaccounts` method, which is more suitable for advanced accounts use case.</p>
@@ -321,6 +324,24 @@ <h3>Method Details</h3>
 }</pre>
 </div>
 
+<div class="method">
+    <code class="details" id="getAccountForGcpRegistration">getAccountForGcpRegistration(x__xgafv=None)</code>
+  <pre>Retrieves the merchant account that the calling GCP is registered with.
+
+Args:
+  x__xgafv: string, V1 error format.
+    Allowed values
+      1 - v1 error format
+      2 - v2 error format
+
+Returns:
+  An object of the form:
+
+    { # Response message for the GetAccountForGcpRegistration method.
+  &quot;name&quot;: &quot;A String&quot;, # The name of the merchant account id that the GCP is registered with.
+}</pre>
+</div>
+
 <div class="method">
     <code class="details" id="list">list(filter=None, pageSize=None, pageToken=None, x__xgafv=None)</code>
   <pre>Note: For the `accounts.list` method, quota and limits usage are charged for each user, and not for the Merchant Center ID or the advanced account ID. To list several sub-accounts, you should use the `accounts.listSubaccounts` method, which is more suitable for advanced accounts use case.

googleapiclient/discovery_cache/documents/merchantapi.accounts_v1.json

@@ -180,6 +180,21 @@
 "https://www.googleapis.com/auth/content"
 ]
 },
+"getAccountForGcpRegistration": {
+"description": "Retrieves the merchant account that the calling GCP is registered with.",
+"flatPath": "accounts/v1/accounts:getAccountForGcpRegistration",
+"httpMethod": "GET",
+"id": "merchantapi.accounts.getAccountForGcpRegistration",
+"parameterOrder": [],
+"parameters": {},
+"path": "accounts/v1/accounts:getAccountForGcpRegistration",
+"response": {
+"$ref": "GetAccountForGcpRegistrationResponse"
+},
+"scopes": [
+"https://www.googleapis.com/auth/content"
+]
+},
 "list": {
 "description": "Note: For the `accounts.list` method, quota and limits usage are charged for each user, and not for the Merchant Center ID or the advanced account ID. To list several sub-accounts, you should use the `accounts.listSubaccounts` method, which is more suitable for advanced accounts use case.",
 "flatPath": "accounts/v1/accounts",
@@ -2361,7 +2376,7 @@
 }
 }
 },
-"revision": "20250830",
+"revision": "20250909",
 "rootUrl": "https://merchantapi.googleapis.com/",
 "schemas": {
 "About": {
@@ -3486,6 +3501,17 @@
 },
 "type": "object"
 },
+"GetAccountForGcpRegistrationResponse": {
+"description": "Response message for the GetAccountForGcpRegistration method.",
+"id": "GetAccountForGcpRegistrationResponse",
+"properties": {
+"name": {
+"description": "The name of the merchant account id that the GCP is registered with.",
+"type": "string"
+}
+},
+"type": "object"
+},
 "Handshake": {
 "description": "The current status of establishing of the service. (for example, pending approval or approved).",
 "id": "Handshake",

googleapiclient/discovery_cache/documents/merchantapi.accounts_v1beta.json

@@ -180,6 +180,21 @@
 "https://www.googleapis.com/auth/content"
 ]
 },
+"getAccountForGcpRegistration": {
+"description": "Retrieves the merchant account that the calling GCP is registered with.",
+"flatPath": "accounts/v1beta/accounts:getAccountForGcpRegistration",
+"httpMethod": "GET",
+"id": "merchantapi.accounts.getAccountForGcpRegistration",
+"parameterOrder": [],
+"parameters": {},
+"path": "accounts/v1beta/accounts:getAccountForGcpRegistration",
+"response": {
+"$ref": "GetAccountForGcpRegistrationResponse"
+},
+"scopes": [
+"https://www.googleapis.com/auth/content"
+]
+},
 "list": {
 "description": "Note: For the `accounts.list` method, quota and limits usage are charged for each user, and not for the Merchant Center ID or the advanced account ID. To list several sub-accounts, you should use the `accounts.listSubaccounts` method, which is more suitable for advanced accounts use case.",
 "flatPath": "accounts/v1beta/accounts",
@@ -2311,7 +2326,7 @@
 }
 }
 },
-"revision": "20250830",
+"revision": "20250909",
 "rootUrl": "https://merchantapi.googleapis.com/",
 "schemas": {
 "About": {
@@ -3363,6 +3378,17 @@
 },
 "type": "object"
 },
+"GetAccountForGcpRegistrationResponse": {
+"description": "Response message for the GetAccountForGcpRegistration method.",
+"id": "GetAccountForGcpRegistrationResponse",
+"properties": {
+"name": {
+"description": "The name of the merchant account id that the GCP is registered with.",
+"type": "string"
+}
+},
+"type": "object"
+},
 "Handshake": {
 "description": "The current status of establishing of the service. (for example, pending approval or approved).",
 "id": "Handshake",