Fix code style remarks

Relates-To: IOTSDK-24021

Signed-off-by: Mykhailo Diachenko <ext-mykhailo.z.diachenko@here.com>

Author: diachenko-mischa

olp-cpp-sdk-authentication/src/AuthenticationClientUtils.cpp

@@ -98,7 +98,7 @@ constexpr auto kDate = "date";
 
 #ifdef _WIN32
 // Windows does not have ::strptime and ::timegm
-std::time_t doParseTime(const std::string& value) {
+std::time_t DoParseTime(const std::string& value) {
   std::tm tm = {};
   std::istringstream ss(value);
   ss >> std::get_time(&tm, "%a, %d %b %Y %H:%M:%S %z");
@@ -107,27 +107,26 @@ std::time_t doParseTime(const std::string& value) {
 
 #else
 
-std::time_t doParseTime(const std::string& value) {
+std::time_t DoParseTime(const std::string& value) {
   std::tm tm = {};
-  std::istringstream ss(value);
   const auto format = "%a, %d %b %Y %H:%M:%S %Z";
-  const auto parsedUntil = ::strptime(value.c_str(), format, &tm);
-  if (parsedUntil != value.c_str() + value.size()) {
+  const auto parsed_until = ::strptime(value.c_str(), format, &tm);
+  if (parsed_until != value.c_str() + value.size()) {
     OLP_SDK_LOG_WARNING(kLogTag, "Timestamp is not fully parsed" << value);
   }
   return timegm(&tm);
 }
 
 #endif
 
-std::time_t gmtEpochOffset() {
-  const auto epochAsDateTime = "Thu, 1 Jan 1970 0:00:00 GMT";
-  return doParseTime(epochAsDateTime);
+std::time_t GmtEpochOffset() {
+  const auto epoch_as_date_time = "Thu, 1 Jan 1970 0:00:00 GMT";
+  return DoParseTime(epoch_as_date_time);
 }
 
 std::time_t ParseTime(const std::string& value) {
-  const auto time = doParseTime(value);
-  const auto offset = gmtEpochOffset();
+  const auto time = DoParseTime(value);
+  const auto offset = GmtEpochOffset();
   return time - offset;
 }