Change Details

> This diff is large, but smaller parts make no sense without each other. Introduced two entities: - `HttpAuthenticatedService` trait - to be implemented by services like `ReportsService` or `BlobServiceClient`. They do require either CSAM (UserIdentity) or a service-to-service token to work (e.g. make blob calls). But they can still be used in unauthenticated endpoints. - `Authenticated<S>` extractor. This is to be used in HTTP handler functions to get an instance of an aforementioned service. The business logic code (`FromRequest` impl) was already implemented for Reports service. I extracted it into the above trait and made more flexible. Added lots of in-code comments to better understand. In the next diff, this will be implemented for Backup service. Depends on D12506

> This diff is large, but smaller parts make no sense without each other. Introduced two entities: - `HttpAuthenticatedService` trait - to be implemented by services like `ReportsService` or `BlobServiceClient`. They do require either CSAM (UserIdentity) or a service-to-service token to work (e.g. make blob calls). But they can still be used in unauthenticated endpoints. - `Authenticated<S>` extractor. This is to be used in HTTP handler functions to get an instance of an aforementioned service - see D12508 for example usage. The business logic code (`FromRequest` impl) was already implemented for Reports service. I extracted it into the above trait and made more flexible. Added lots of in-code comments to better understand. In the next diff, this will be implemented for Backup service - D12508. Depends on D12506

> This diff is large, but smaller parts make no sense without each other. Introduced two entities: - `HttpAuthenticatedService` trait - to be implemented by services like `ReportsService` or `BlobServiceClient`. They do require either CSAM (UserIdentity) or a service-to-service token to work (e.g. make blob calls). But they can still be used in unauthenticated endpoints. - `Authenticated<S>` extractor. This is to be used in HTTP handler functions to get an instance of an aforementioned service - see D12508 for example usage. The business logic code (`FromRequest` impl) was already implemented for Reports service. I extracted it into the above trait and made more flexible. Added lots of in-code comments to better understand. In the next diff, this will be implemented for Backup service - D12508. Depends on D12506