Implement Admin APIs for Tenants

[k1ch]

Feature Overview

Is your feature request related to a problem? Please describe.
As an admin usher user, I would like to have APIs available to manage tenants.

API Design

Status	URL	Auth	Params	Notes
✅	GET /tenants	bearerAdminAuth	optional: query param	List tenants
✅	POST /tenants	bearerAdminAuth	Tenant attributes: body	Create a new tenant
TODO	GET /tenants/{key}	bearerAdminAuth	optional: query param	Get single tenant
TODO	PATCH /tenants/{key}	bearerAdminAuth	Tenant attributes: body	Update existing tenant
TODO	DELETE /tenants/{key}	bearerAdminAuth	Tenant key: path, required	Delete a tenant

Implementation Notes

• The source files should be placed in the src/api_endpoints/tenants folder.

Questions

1. Regarding the PATCH API, besides the tenant key and timestamps, should there be any restrictions on what can be updated for a tenant?