Creating a service with dynamic arguments like user-specific credentials can be effectively manag...

export const makeOutlookGraphClient = Effect.fnUntraced(function* (
    credentials: CredentialsEntity,
) {
  const client = buildClient(credentials)

  const listCalendars = (): Effect.Effect<GraphCalendar[], GraphClientError>
  const listEvents = (calenderId: CalendarId): Effect.Effect<GraphCalendar[], GraphClientError>
  ...
}

class OutlookConfigClient extends Context.Tag(
    'outlook-calendar-client/OutlookConfigClient',
)<
    OutlookConfigClient,
    {
        credentials: CredentialsEntity
    }
>() {}

class OutlookGraphClient2 extends Context.Tag(
    'outlook-calendar-client/OutlookGraphClient',
)<
    OutlookGraphClient2,
    {
        listCalendars: () => Effect.Effect<GraphCalendar[], GraphClientError>
    }
>() {
    static layer = Effect.gen(function* () {
        const config = yield* OutlookConfigClient
        const client = buildClient(config.credentials)

        return {...}
    })
}

const someController = Effect.fn('someController')(function* (req: Request) {
    const creds = getCredentials(req)

    const client = yield* OutlookGraphClient2.layer.pipe(
        Effect.provideService(
            OutlookConfigClient,
            { credentials: creds },
        ),
    )
    return yield* client.listCalendars()
})