Power Automate- HTTP Request: Cannot recognize sharepoint list column that begins with a number, how to find the column name to use

When trying to get the column name from a "Send an HTTP request to Sharepoint" action, because I was trying to get the column value BEFORE the value was changed. I need to log the old value into a "log" column.

In the Sharepoint List,  I named the column "2026-Assignments" and the column name looked like, "_x0032_026_x002d_Assignments" when I looked at the columns url in list settings. Example below:

Adding  a "Get Items" action to your flow, doesn't work either.

Here's how I finally found the name of the column.
When you run the flow either in a test or a failed attempt.

Look at the "Send an HTTP request to Sharepoint" action and see what the column name is.
 

My end expression:
body('Send_an_HTTP_request_to_SharePoint').d.OData__x005f_x0032_x005f_026_x005f_x002d_x005f_Assignments