I've been trying to get the start page with no success to update its default route's transition route to another page (doing it programmatically), I saw in the docs that the id of the start page is START_PAGE here but the problem is when I actually try to get the page I get this error:
com.google.apps.framework.request.NotFoundException: Page 'START_PAGE' does not exist in the flow.
I used the client libraries for node.js that Dialogflow CX offers
I'm also using the default start flow which is in the same resource.
I've also tried looking though all my pages with the listPages method and all my pages appear but the start page
Is the start page a special element I should be looking in other places?