message: Update tasty-poems-raise.md
diff: '@backstage/plugin-auth-backend': minor
  ---
  -Added validation to TokenFactory.issueToken that ensure any sub claim given is a valid entityRef. This will affect any custom resolver functions given to auth providers.
  +**BREAKING**: The `TokenFactory.issueToken` used by custom sign-in resolvers now ensures that the sub claim given is a full entity reference of the format `<kind>:<namespace>/<name>`. Any existing custom sign-in resolver functions that do not supply a full entity reference must be updated.
  