CLICKHOUSE-3700: Fix empty password on replica query

dbms/src/Interpreters/ClientInfo.h

@@ -47,6 +47,7 @@ public:
     String current_user;
     String current_query_id;
     Poco::Net::SocketAddress current_address;
+    String current_password;
 
     /// When query_kind == INITIAL_QUERY, these values are equal to current.
     String initial_user;

dbms/src/Interpreters/Context.cpp

@@ -564,6 +564,7 @@ void Context::setUser(const String & name, const String & password, const Poco::
 
     client_info.current_user = name;
     client_info.current_address = address;
+    client_info.current_password = password;
 
     if (!quota_key.empty())
         client_info.quota_key = quota_key;

dbms/src/Storages/StorageReplicatedMergeTree.cpp

@@ -3277,7 +3277,7 @@ void StorageReplicatedMergeTree::sendRequestToLeaderReplica(const ASTPtr & query
         leader_address.host,
         leader_address.queries_port,
         leader_address.database,
-        "", "", timeouts, "ClickHouse replica");
+        context.getClientInfo().current_user, context.getClientInfo().current_password, timeouts, "ClickHouse replica");
 
     RemoteBlockInputStream stream(connection, formattedAST(new_query), {}, context, &settings);
     NullBlockOutputStream output({});