No. 
I can suggest voting for these two roadmap items.
It might (I haven’t tested this) be possible to configure a token under the project-level Administration > Pull Requests. When using the Azure DevOps extension, this is actually the only missing piece of information the server has to populate. I’m not sure if something about being in a Github organization will override it, however.
Edit: I guess this is the same advice my colleague gave you two years ago. Did you try it (it might be worth trying again?)