Fixed double quotes escaping when saving 'attributes' to config file

lib/ProxySQL_Config.cpp

@@ -1,4 +1,5 @@
 #include "proxysql_config.h"
+#include "re2/re2.h"
 #include "proxysql.h"
 #include "cpp.h"
 
@@ -108,6 +109,10 @@ int ProxySQL_Config::Write_MySQL_Users_to_configfile(std::string& data) {
 			data += "mysql_users:\n(\n";
 			bool isNext = false;
 			for (auto r : sqlite_resultset->rows) {
+				// Prepare fields
+				std::string attributes { r->fields[12] };
+				RE2::GlobalReplace(&attributes, "\"", "\\\\\"");
+
 				if (isNext)
 					data += ",\n";
 				data += "\t{\n";
@@ -123,7 +128,7 @@ int ProxySQL_Config::Write_MySQL_Users_to_configfile(std::string& data) {
 				addField(data, "backend", r->fields[9], "");
 				addField(data, "frontend", r->fields[10], "");
 				addField(data, "max_connections", r->fields[11], "");
-				addField(data, "attributes", r->fields[12]);
+				addField(data, "attributes", attributes.c_str());
 				addField(data, "comment", r->fields[13]);
 				data += "\t}";
 				isNext = true;