Auth: Sign sigV4 request after adding headers (#87063)
(cherry picked from commit 7b392d40a0)
Co-authored-by: Isabella Siu <Isabella.siu@grafana.com>
Auth: Sign sigV4 request after adding headers (#87063)
(cherry picked from commit 7b392d40a0)
Co-authored-by: Isabella Siu <Isabella.siu@grafana.com>