Bazaar-backend: Add user entity field to members table

A new field has been added to the members table. When a user has
requested to be added to a project the "identityApi" is used to get the
entity ref of the user.

Signed-off-by: Niklas Aronsson <niklasar@axis.com>

plugins/bazaar-backend/package.json

@@ -25,6 +25,7 @@
     "@backstage/backend-common": "workspace:^",
     "@backstage/backend-test-utils": "workspace:^",
     "@backstage/config": "workspace:^",
+    "@backstage/plugin-auth-node": "workspace:^",
     "@types/express": "^4.17.6",
     "express": "^4.17.1",
     "express-promise-router": "^4.1.0",