Cloud migrations: create endpoint to create an access token (#84690)

* fix merge conflicts

* make token expiration configurable

pkg/services/cloudmigration/cloudmigrationimpl/metric.go

@@ -2,25 +2,50 @@ package cloudmigrationimpl
 
 import (
 	"errors"
+	"fmt"
 
-	"github.com/grafana/grafana/pkg/services/cloudmigration"
 	"github.com/prometheus/client_golang/prometheus"
 )
 
 // type Metrics struct {
-// 	log log.Logger
-// }
+const (
+	namespace = "grafana"
+	subsystem = "cloudmigrations"
+)
 
-func (s *Service) registerMetrics(prom prometheus.Registerer) error {
-	for _, m := range cloudmigration.PromMetrics {
-		if err := prom.Register(m); err != nil {
-			var alreadyRegisterErr prometheus.AlreadyRegisteredError
-			if errors.As(err, &alreadyRegisterErr) {
-				s.log.Warn("metric already registered", "metric", m)
-				continue
-			}
-			return err
+var PromMetrics = []prometheus.Collector{
+	prometheus.NewCounterVec(prometheus.CounterOpts{
+		Namespace: namespace,
+		Subsystem: subsystem,
+		Name:      "datasources_migrated",
+		Help:      "Total amount of data sources migrated",
+	}, []string{"pdc_converted"}),
+}
+
+type Metrics struct {
+	accessTokenCreated *prometheus.CounterVec
+}
+
+func newMetrics() *Metrics {
+	return &Metrics{
+		accessTokenCreated: prometheus.NewCounterVec(prometheus.CounterOpts{
+			Namespace: namespace,
+			Subsystem: subsystem,
+			Name:      "access_token_created",
+			Help:      "Total of access tokens created",
+		}, []string{"slug"}),
+	}
+}
+
+func (s *Service) registerMetrics(prom prometheus.Registerer, metrics *Metrics) error {
+	if err := prom.Register(metrics.accessTokenCreated); err != nil {
+		var alreadyRegisterErr prometheus.AlreadyRegisteredError
+		if errors.As(err, &alreadyRegisterErr) {
+			s.log.Warn("metric already registered", "metric", metrics.accessTokenCreated)
+		} else {
+			return fmt.Errorf("registering access token created metric: %w", err)
 		}
 	}
+
 	return nil
 }