Bug: Check for "none" when checking pod identity provider (#4748)

CHANGELOG.md

@@ -57,6 +57,7 @@ To learn more about active deprecations, we recommend checking [GitHub Discussio
 
 - **General**: Paused ScaledObject continues working after removing the annotation ([#4733](https://github.com/kedacore/keda/issues/4733))
 - **General**: Skip resolving secrets if namespace is restricted ([#4519](https://github.com/kedacore/keda/issues/4519))
+- **Prometheus**: Authenticated connections to Prometheus work in non-PodIdenty case ([#4695](https://github.com/kedacore/keda/issues/4695))
 
 ### Deprecations
 

pkg/scalers/prometheus_scaler.go

@@ -16,6 +16,7 @@ import (
 	v2 "k8s.io/api/autoscaling/v2"
 	"k8s.io/metrics/pkg/apis/external_metrics"
 
+	kedav1alpha1 "github.com/kedacore/keda/v2/apis/keda/v1alpha1"
 	"github.com/kedacore/keda/v2/pkg/scalers/authentication"
 	"github.com/kedacore/keda/v2/pkg/scalers/azure"
 	kedautil "github.com/kedacore/keda/v2/pkg/util"
@@ -237,7 +238,7 @@ func parseAuthConfig(config *ScalerConfig, meta *prometheusMetadata) error {
 		return err
 	}
 
-	if auth != nil && config.PodIdentity.Provider != "" {
+	if auth != nil && !(config.PodIdentity.Provider == kedav1alpha1.PodIdentityProviderNone || config.PodIdentity.Provider == "") {
 		return fmt.Errorf("pod identity cannot be enabled with other auth types")
 	}
 	meta.prometheusAuth = auth