fix search service startup (#7795)

Signed-off-by: jkoberg <jkoberg@owncloud.com>

services/search/pkg/config/parser/parse.go

@@ -4,6 +4,7 @@ import (
 	"errors"
 
 	ociscfg "github.com/owncloud/ocis/v2/ocis-pkg/config"
+	"github.com/owncloud/ocis/v2/ocis-pkg/shared"
 	"github.com/owncloud/ocis/v2/services/search/pkg/config"
 	"github.com/owncloud/ocis/v2/services/search/pkg/config/defaults"
 
@@ -33,5 +34,8 @@ func ParseConfig(cfg *config.Config) error {
 }
 
 func Validate(cfg *config.Config) error {
+	if cfg.TokenManager.JWTSecret == "" {
+		return shared.MissingJWTTokenError(cfg.Service.Name)
+	}
 	return nil
 }