Implement SEP-990 Enterprise Managed OAuth #1631

Job	Run time
checks / pre-commit	33s
checks / readme-snippets	12s
checks / test (3.13, lowest-direct, windows-latest)	2m 33s
checks / test (3.13, lowest-direct, ubuntu-latest)	51s
checks / test (3.11, lowest-direct, ubuntu-latest)	54s
checks / test (3.12, locked, ubuntu-latest)	56s
checks / test (3.14, locked, ubuntu-latest)	2m 14s
checks / test (3.10, lowest-direct, windows-latest)	2m 6s
checks / test (3.12, locked, windows-latest)	3m 32s
checks / test (3.10, lowest-direct, ubuntu-latest)	56s
checks / test (3.13, locked, windows-latest)	2m 6s
checks / test (3.12, lowest-direct, ubuntu-latest)	57s
checks / test (3.14, lowest-direct, windows-latest)	2m 10s
checks / test (3.11, lowest-direct, windows-latest)	3m 10s
checks / test (3.10, locked, windows-latest)	2m 13s
checks / test (3.11, locked, windows-latest)	2m 58s
checks / test (3.12, lowest-direct, windows-latest)	3m 20s
checks / test (3.11, locked, ubuntu-latest)	48s
checks / test (3.14, locked, windows-latest)	3m 1s
checks / test (3.13, locked, ubuntu-latest)	45s
checks / test (3.10, locked, ubuntu-latest)	53s
checks / test (3.14, lowest-direct, ubuntu-latest)	1m 8s
all-green	2s
	38m 18s

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