Updated subscriptions

backend/internal/firebase/users.go

@@ -0,0 +1,22 @@
+package firebase
+
+import (
+	"context"
+	"fmt"
+
+	"firebase.google.com/go/v4/auth"
+)
+
+// SetUserDisabled updates the Firebase user record's disabled flag.
+func SetUserDisabled(ctx context.Context, uid string, disabled bool) error {
+	if authClient == nil {
+		return fmt.Errorf("firebase auth not initialized") //nolint:err113
+	}
+	if uid == "" {
+		return nil
+	}
+
+	params := (&auth.UserToUpdate{}).Disabled(disabled)
+	_, err := authClient.UpdateUser(ctx, uid, params)
+	return err
+}