Added changeset for backstage#2613

.changeset/2613.md

@@ -0,0 +1,11 @@
+---
+'@backstage/plugin-auth-backend': minor
+---
+Initial implementation of catalog user lookup
+
+This adds a basic catalog client + method for the Google provider to look up users in the catalog. It expects to find a single user entity in the catalog with a google.com/email annotation that matches the email of the Google profile.
+
+Right now it falls back to the old behavior of splitting the email, since I don't wanna break the sign-in flow for existing apps, not yet anyway x).
+
+- Added "@backstage/catalog-model@^0.1.1-alpha.23" as a dependency
+- Added "node-fetch@^2.6.1" as a dependency