If the token is null, the connection hangs (#458) #3107

Job	Run time
Unit Tests + PyArrow (Python 3.14, default deps)	2m 35s
check-linting (3.11)	19s
Unit Tests + Kernel (Python 3.11)	2m 35s
Unit Tests + PyArrow (Python 3.10, default deps)	2m 37s
check-types (3.12)	20s
check-types (3.10)	18s
check-types (3.13)	18s
Unit Tests + Kernel (Python 3.10)	2m 43s
Unit Tests + Kernel (Python 3.14)	2m 34s
check-types (3.11)	18s
check-types (3.14)	21s
Unit Tests + Kernel (Python 3.12)	2m 40s
check-linting (3.14)	20s
check-linting (3.13)	20s
Unit Tests (Python 3.11, min deps)	1m 58s
Unit Tests (Python 3.12, default deps)	2m 1s
Unit Tests + Kernel (Python 3.13)	3m 3s
Unit Tests + PyArrow (Python 3.10, min deps)	2m 43s
Unit Tests + PyArrow (Python 3.12, default deps)	2m 33s
check-linting (3.10)	20s
check-linting (3.12)	20s
Unit Tests (Python 3.13, default deps)	2m 2s
Unit Tests (Python 3.11, default deps)	2m 1s
Unit Tests + PyArrow (Python 3.13, default deps)	2m 48s
Unit Tests + PyArrow (Python 3.11, default deps)	2m 29s
Unit Tests (Python 3.10, default deps)	2m 0s
Unit Tests (Python 3.10, min deps)	2m 0s
Unit Tests + PyArrow (Python 3.11, min deps)	2m 36s
Unit Tests (Python 3.14, default deps)	2m 4s
Unit Tests + PyArrow (Python 3.14, min deps)	2m 41s
Unit Tests (Python 3.14, min deps)	2m 2s
	53m 59s

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