[enhancement]: Implement phase 3 This feature should implement Phase 3 of the multiuser feature implementation plan

[lstein]

Is there an existing issue for this?

• I have searched the existing issues

Contact Details

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What should this feature add?

This feature should implement Phase 3 of the multiuser feature implementation plan described in docs/multiuser/implementation_plan.md

Alternatives

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Additional Content

Please provide information on functional testing of the PR.