Is your feature request related to a problem? Please describe.
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No.

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Every user should be able to set their own API Key, use their own quota.
Or even further more, add the quota data, and add a price data for every model (charge for tokens or requests), then will be able to limit the usage for every user. So that the admin can only set the main Key.

Describe alternatives you've considered
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Every user use their own Key should be easy to modify the system.

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We all know the long chat costs quota a lot, there should be a way to limit every user, or even just know everyone's usage.
The road map mentioned a finely control access level, but no specific describe, if my issue already in your plan, just ignore this.