If the token is null, the connection hangs (#458) #3104

Job	Run time
check-types (3.14)	20s
check-types (3.11)	37s
Unit Tests + PyArrow (Python 3.12, default deps)	2m 33s
check-types (3.13)	20s
Unit Tests + Kernel (Python 3.12)	2m 31s
Unit Tests + PyArrow (Python 3.10, default deps)	2m 32s
Unit Tests + Kernel (Python 3.10)	2m 52s
Unit Tests + PyArrow (Python 3.13, default deps)	2m 35s
check-linting (3.10)	20s
Unit Tests + Kernel (Python 3.13)	2m 30s
Unit Tests (Python 3.14, min deps)	2m 3s
check-types (3.10)	19s
Unit Tests + PyArrow (Python 3.14, min deps)	2m 39s
check-types (3.12)	18s
Unit Tests + Kernel (Python 3.14)	2m 40s
Unit Tests + Kernel (Python 3.11)	2m 35s
Unit Tests + PyArrow (Python 3.14, default deps)	2m 33s
Unit Tests (Python 3.14, default deps)	2m 2s
Unit Tests + PyArrow (Python 3.10, min deps)	2m 28s
check-linting (3.12)	18s
check-linting (3.13)	17s
check-linting (3.14)	17s
Unit Tests (Python 3.11, default deps)	1m 57s
check-linting (3.11)	20s
Unit Tests + PyArrow (Python 3.11, default deps)	2m 27s
Unit Tests (Python 3.10, min deps)	1m 59s
Unit Tests (Python 3.10, default deps)	1m 58s
Unit Tests + PyArrow (Python 3.11, min deps)	2m 33s
Unit Tests (Python 3.11, min deps)	1m 55s
Unit Tests (Python 3.12, default deps)	1m 58s
Unit Tests (Python 3.13, default deps)	1m 58s
	52m 44s

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