Implement SEP-990 Enterprise Managed OAuth #826

Job	Run time
checks / pre-commit	33s
checks / readme-snippets	13s
checks / test (3.11, lowest-direct, windows-latest)	2m 23s
checks / test (3.12, lowest-direct, ubuntu-latest)	1m 2s
checks / test (3.14, lowest-direct, windows-latest)	2m 18s
checks / test (3.10, lowest-direct, ubuntu-latest)	56s
checks / test (3.13, lowest-direct, ubuntu-latest)	56s
checks / test (3.10, locked, windows-latest)	2m 10s
checks / test (3.12, locked, windows-latest)	3m 10s
checks / test (3.13, locked, windows-latest)	2m 19s
checks / test (3.12, locked, ubuntu-latest)	58s
checks / test (3.13, lowest-direct, windows-latest)	2m 35s
checks / test (3.10, lowest-direct, windows-latest)	2m 17s
checks / test (3.14, lowest-direct, ubuntu-latest)	1m 11s
checks / test (3.11, lowest-direct, ubuntu-latest)	52s
checks / test (3.11, locked, windows-latest)	2m 15s
checks / test (3.13, locked, ubuntu-latest)	49s
checks / test (3.11, locked, ubuntu-latest)	55s
checks / test (3.10, locked, ubuntu-latest)	47s
checks / test (3.12, lowest-direct, windows-latest)	3m 24s
checks / test (3.14, locked, windows-latest)	3m 3s
checks / test (3.14, locked, ubuntu-latest)	2m 16s
all-green	3s
	37m 25s

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