Implement connector's Validate method

pkg/connector/connector.go

@@ -7,6 +7,8 @@ import (
 	v2 "github.com/conductorone/baton-sdk/pb/c1/connector/v2"
 	"github.com/conductorone/baton-sdk/pkg/annotations"
 	"github.com/conductorone/baton-sdk/pkg/connectorbuilder"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/status"
 )
 
 var (
@@ -52,6 +54,12 @@ func (pd *PagerDuty) Metadata(ctx context.Context) (*v2.ConnectorMetadata, error
 
 // Validate hits the PagerDuty API to validate that the configured credentials are still valid.
 func (pd *PagerDuty) Validate(ctx context.Context) (annotations.Annotations, error) {
+	_, err := pd.client.ListUsersWithContext(ctx, pagerduty.ListUsersOptions{})
+
+	if err != nil {
+		return nil, status.Error(codes.Unauthenticated, "Provided Access Token is invalid")
+	}
+
 	return nil, nil
 }