Don't persist credentials #446

Job	Run time
Create sdist and Python 3 Wheel	31s
Test Typing (sdist)	37s
Test Documentation	30s
Create Python 2 Wheel	46s
Test Typing (wheel)	36s
Test Package (2.7, sdist)	16s
Test Package (2.7, wheel)	14s
Test Package (3.3, sdist)	22s
Test Package (3.3, wheel)	18s
Test Package (3.4, sdist)	26s
Test Package (3.4, wheel)	17s
Test Package (3.5, sdist)	16s
Test Package (3.5, wheel)	15s
Test Package (3.6, sdist)	15s
Test Package (3.6, wheel)	15s
Test Package (3.7, sdist)	14s
Test Package (3.7, wheel)	15s
Test Package (3.8, sdist)	19s
Test Package (3.8, wheel)	16s
Test Package (3.9, sdist)	25s
Test Package (3.9, wheel)	24s
Test Package (3.10, sdist)	27s
Test Package (3.10, wheel)	36s
Test Package (3.11, sdist)	28s
Test Package (3.11, wheel)	24s
Test Package (3.12, sdist)	29s
Test Package (3.12, wheel)	27s
Test Package (3.13, sdist)	27s
Test Package (3.13, wheel)	25s
	11m 30s

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