public AuthServiceBuilder meterIdPrefix(MeterIdPrefix meterIdPrefix) {
        this.meterIdPrefix = requireNonNull(meterIdPrefix, "meterIdPrefix");
        return this;
    }
Sets the {@link MeterIdPrefix} pattern to which metrics will be collected.
By default, {@code armeria.server.auth} will be used as the metric name.
<table>
<caption>Metrics that will be generated by this class</caption>
<tr>
  <th>metric name</th>
  <th>description</th>
</tr>
<tr>
  <td>{@code <name>#count{result="success"}}</td>
  <td>The number of successful authentication requests.</td>
</tr>
<tr>
  <td>{@code <name>#count{result="failure"}}</td>
  <td>The number of failed authentication requests.</td>
</tr>
</table>
core/src/main/java/com/linecorp/armeria/server/auth/AuthServiceBuilder.java