You really should let us use the graphql API or update the v1 into something usefull (for example the Microsoft Graph), we need a good api 🙂
It's also very confusing when you say "Supported endpoints" when for example "/groups/[:id]" isn't in the official API-specification https://developer.yammer.com/docs/messagesmy_feedjson . Is this endpoint now supported or not? Its very frustrating that so many basic endpoints are undocumented.
Is there a way to find the ID of the associated Microsoft Group using the V1-api? We know that you (but not we) can do it using the graphql API and that its a quite important function to build any kind of integrated experience.
If we know the SharePoint url or Microsoft Group Id we need to have a API to find the associated Yammer group id and also vice versa
We also need application permissions. If the API was stronger I think we would see more innovation and usage out there, today its hard to get anyone interested in building anything due to the struggle involved