YubiAuth: Fix getting a device challenge #2345

Job	Run time
build on fedora:40 (gcc, true)	1m 49s
build on fedora:40 (clang, false)	1m 34s
build on ubuntu:24.04 (gcc,false)	1m 27s
build on macos (macos-latest)	44s
build on fedora:39 (gcc, false)	1m 53s
build on ubuntu:24.04 (clang,false)	1m 36s
build on macos (macos-latest-xlarge)	46s
build on fedora:39 (clang, false)	2m 24s
build on ubuntu:23.10 (gcc,false)	1m 18s
build on ubuntu:23.10 (clang,false)	1m 39s
build on ubuntu:22.04 (gcc,false)	1m 22s
build on ubuntu:22.04 (clang,true)	1m 33s
build on ubuntu:20.04 (gcc,false)	1m 31s
build on ubuntu:20.04 (clang,false)	1m 40s
build on debian:12 (gcc,false)	1m 28s
build on debian:12 (clang,false)	1m 32s
build on debian:11 (gcc,false)	1m 16s
build on debian:11 (clang,false)	1m 37s
run unit tests (ubuntu:22.04, clang)	12m 23s
run unit tests (fedora:40, gcc)	12m 31s
	52m 3s

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