Adjust to changed signature of PermissionBackend#user

Change-Id: Id2ad0b6b6b5db91af2ec473a98d4dc5fccffe1b3

src/main/java/com/googlesource/gerrit/plugins/metricsreporters/CapabilityChecker.java

diff --git a/src/main/java/com/googlesource/gerrit/plugins/metricsreporters/CapabilityChecker.java b/src/main/java/com/googlesource/gerrit/plugins/metricsreporters/CapabilityChecker.java
index ae7bc93..603e7cc 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/metricsreporters/CapabilityChecker.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/metricsreporters/CapabilityChecker.java
@@ -44,7 +44,7 @@
   public boolean canViewMetrics() {
     try {
       permissionBackend
-          .user(userProvider)
+          .user(userProvider.get())
           .checkAny(
               ImmutableSet.of(
                   GlobalPermission.ADMINISTRATE_SERVER,