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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• All automated tests pass
• Reference related issues
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  • Intent of new code
  • Problems with old code
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Check List for the Reviewer

• 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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include/caosdb/file_transmission/download_request_handler.h

@@ -55,10 +55,10 @@
 #include "caosdb/file_transmission/file_writer.h" // for FileWriter
 #include "caosdb/handler_interface.h"             // for HandlerTag, Handl...
 #include <cstdint>                                // for uint64_t
-#include <grpcpp/client_context.h>                 // for ClientContext
-#include <grpcpp/completion_queue.h>               // for CompletionQueue
-#include <grpcpp/support/async_stream.h>           // for ClientAsyncReader
-#include <grpcpp/support/status.h>                 // for Status
+#include <grpcpp/client_context.h>                // for ClientContext
+#include <grpcpp/completion_queue.h>              // for CompletionQueue
+#include <grpcpp/support/async_stream.h>          // for ClientAsyncReader
+#include <grpcpp/support/status.h>                // for Status
 #include <memory>                                 // for unique_ptr
 
 namespace caosdb::transaction {