A "NullPointerException" could be thrown on ByteUtils.java#L54
Hello,
A NPE can be thrown here https://gitlab.inria.fr/stopcovid19/robert-server/-/blob/develop/robert-server-common/src/main/java/fr/gouv/stopc/robert/server/common/utils/ByteUtils.java#L54 if "b" is null.
Found while scanning the code with SonarCloud.io: https://sonarcloud.io/project/issues?id=stopcovid-robert-server&issues=AXI8wqKM7rtBPvduls7d&open=AXI8wqKM7rtBPvduls7d