chore: Make HandleCustomerAuthInput non-generic #773

Job	Run time
check_changes	5s
build-assistant-ui	0s
build-app	0s
build-app-image	0s
build-cli	0s
build-control-plane	0s
build-control-plane-image	0s
build-data-connector-image	0s
build-dotnet	1m 46s
build-go	0s
build-load-test-machine-image	0s
build-node	0s
build-react	0s
test-control-plane	0s
test-go	0s
deploy-cloud	0s
test-cli	0s
test-react	0s
test-node	0s
test-dotnet	2m 31s
	4m 22s

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