Project: usergrid
Issue USERGRID-567: Validate External Token for Usergrid Central SSO
The requirement is to have multiple Usergrid systems, each with its own Cassandra cluster, be able to authenticate Admin Users with one central Usergrid system -- giving Admin Users Single-Sign-On (SSO) across all of those systems. We can do this by adding just one new end-point to Usergrid. This Google Doc explains a complete design for "Usergrid Central SSO": https://docs.google.com/document/d/12kXgaYcB6L9JoTyRGn0ZHEMg3vL1LJDqvtnltIBDa1Y/edit?usp=sharing The design is based on earlier work by Ed Anuff and Nate McCall.
Story points: 5