WebTemplate for 'registered sites' template & # 39;

I use MS Flow for POST an HTTP request to SharePoint to create a subsite when an item has been entered into a list.

I want to create this subsite with the help of a site template that I have registered.

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I'm trying to determine the ID of my SharePoint site template, but I do not know where it is.
I have visited this site but I have not found anything here.
https://blogs.technet.microsoft.com/praveenh/10/10/21/sharepoint-templates-and-their-ids/

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Ideas?