Fix NPE with DPoP tokenAuthenticationManager #8460

Job	Run time
Check Samples	12m 12s
Build (windows-latest, 17) / Build	13m 32s
Test Against Snapshots (17, 17) / Test	6m 35s
Test Against Snapshots (21-ea, 21) / Test	6m 50s
Build (ubuntu-latest, 17) / Build	8m 4s
Deploy Docs / Deploy Docs	1m 5s
Deploy Artifacts / Deploy Artifacts	1m 27s
Deploy Schema / Deploy Schema	43s
Send Notification	5s
Perform Release / Perform Release	0s
	50m 33s

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