chore: regens API reference docs (#889)

diff --git a/docs/dyn/cloudsearch_v1.debug.identitysources.unmappedids.html b/docs/dyn/cloudsearch_v1.debug.identitysources.unmappedids.html
index 6b2cbd1..af5941c 100644
--- a/docs/dyn/cloudsearch_v1.debug.identitysources.unmappedids.html
+++ b/docs/dyn/cloudsearch_v1.debug.identitysources.unmappedids.html
@@ -85,6 +85,8 @@
     <code class="details" id="list">list(parent, pageSize=None, resolutionStatusCode=None, debugOptions_enableDebugging=None, pageToken=None, x__xgafv=None)</code>
   <pre>Lists unmapped user identities for an identity source.
 
+**Note:** This API requires an admin account to execute.
+
 Args:
   parent: string, The name of the identity source, in the following format:
 identitysources/{source_id} (required)