We need to have an API for our internal projects.
Use cases we want to cover:

• we need to be able to create webtree union and sub-unions for mydata, imprint etc.
• auth: we need to redirect to sub-unions from main webtree union.
• mydata: we want to get API key and secret from unions to provide third parties to get access to our API.
• imprint: we want to show imprint for all webtree and sub unions. (Github example: webtree organisation should have a summary imprint from its repositories).