F dot in username

Summary

Adds a very simple User class and methods for creation, retrieval and deletion. This allows us to test the user creation/deletion of the GRPC API.

The User class and the methods are only available when the newly introduced "BUILD_ACM" macro is set. The make files and the pipeline has been updated for this.

Focus

The User class is designed after the delegator/wrapper pattern where UserImpl is the delegate. The UserImpl class is a wrapper for protobuf's User message objects. This might look clumsy at first but it has the advantage that the grpc/protobuf code is encapsuled and hidden in the *.cpp file. This is a first test which demonstrates how we can remove the grpc/protobuf dependency from the headers altogether (which will make it easier to compile the library as a shared library on windows).

Test Environment

• See unit test in test_user
• See integration tests in caosdb-cppinttest!23 (merged)

Check List for the Author

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• Reference related issues
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• I understand the intent of this MR
• All automated tests pass
• Up-to-date CHANGELOG.md (or not necessary)
• The test environment setup works and the intended behavior is reproducible in the test environment
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src/caosdb/unary_rpc_handler.cpp

@@ -100,8 +100,8 @@ bool UnaryRpcHandler::OnNext(bool ok) {
 
 void UnaryRpcHandler::Cancel() {
   state_ = CallState::CallComplete;
-  call_context.TryCancel();
   transaction_status = TransactionStatus::CANCELLED();
+  call_context.TryCancel();
 }
 
 void UnaryRpcHandler::handleCallCompleteState() {