Enforce the types for sessionUserInfo. #400

Job	Run time
pod-lib-lint (ios, Debug)	10m 23s
pod-lib-lint (ios, Release)	10m 58s
pod-lib-lint (macos, Debug)	11m 26s
pod-lib-lint (macos, Release)	12m 59s
pod-lib-lint (tvos, Debug)	9m 57s
pod-lib-lint (tvos, Release)	9m 26s
pod-lib-lint (visionos, Debug)	11m 22s
pod-lib-lint (visionos, Release)	10m 4s
pod-lib-lint (watchos --skip-tests, Debug)	4m 56s
pod-lib-lint (watchos --skip-tests, Release)	4m 25s
	1h 35m 56s

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