FIX: Access Token Issue (EntraID Auth) (#285)

### Work Item / Issue Reference <!-- IMPORTANT: Please follow the PR template guidelines below. For mssql-python maintainers: Insert your ADO Work Item ID below (e.g. AB#37452) For external contributors: Insert Github Issue number below (e.g. #149) Only one reference is required - either GitHub issue OR ADO Work Item. --> <!-- mssql-python maintainers: ADO Work Item --> > AB#<WORK_ITEM_ID> <!-- External contributors: GitHub Issue --> > GitHub Issue: #286 ------------------------------------------------------------------- ### Summary <!-- Insert your summary of changes below. Minimum 10 characters required. --> Reintroduce Static Buffer as a temporary hotfix, will keep a new task to remove static tokens. <!-- ### PR Title Guide > For feature requests FEAT: (short-description) > For non-feature requests like test case updates, config updates , dependency updates etc CHORE: (short-description) > For Fix requests FIX: (short-description) > For doc update requests DOC: (short-description) > For Formatting, indentation, or styling update STYLE: (short-description) > For Refactor, without any feature changes REFACTOR: (short-description) > For release related changes, without any feature changes RELEASE: #<RELEASE_VERSION> (short-description) ### Contribution Guidelines External contributors: - Create a GitHub issue first: https://github.com/microsoft/mssql-python/issues/new - Link the GitHub issue in the "GitHub Issue" section above - Follow the PR title format and provide a meaningful summary mssql-python maintainers: - Create an ADO Work Item following internal processes - Link the ADO Work Item in the "ADO Work Item" section above - Follow the PR title format and provide a meaningful summary -->

Author: bewithgaurav

mssql_python/pybind/connection/connection.cpp

@@ -173,7 +173,7 @@ SQLRETURN Connection::setAttribute(SQLINTEGER attribute, py::object value) {
  LOG("Setting SQL attribute");
  SQLPOINTER ptr = nullptr;
  SQLINTEGER length = 0;
- std::string buffer; // to hold sensitive data temporarily
+ static std::string buffer; // to hold sensitive data temporarily
 
  if (py::isinstance<py::int_>(value)) {
  int intValue = value.cast<int>();
@@ -196,10 +196,6 @@ SQLRETURN Connection::setAttribute(SQLINTEGER attribute, py::object value) {
  LOG("Set attribute successfully");
  }
 
- // Zero out sensitive data if used
- if (!buffer.empty()) {
- std::fill(buffer.begin(), buffer.end(), static_cast<char>(0));
- }
  return ret;
 }
 
@@ -383,4 +379,4 @@ py::object ConnectionHandle::getInfo(SQLUSMALLINT infoType) const {
  ThrowStdException("Connection object is not initialized");
  }
  return _conn->getInfo(infoType);
-}
+}