expose Directory Create Transport

[gimmyxd]

Utility method to enable extending the directory v3 class with addition gRPC clients.
Using CreateTransport we ensure that the service is validated and initialed correctly.
eg:

class Ds0 extends DirectoryV3 {
  StoreClient: PromiseClient<typeof Store>

  constructor(config: DirectoryV3Config) {
    super(config)
    const storeTransport = this.CreateTransport(config, undefined)
    this.StoreClient = createPromiseClient(Store, storeTransport!)
  }

  async createTenant(params: PartialMessage<CreateTenantRequest>) {
    try {
      const response = await this.StoreClient.createTenant(params)

      return response.result
    } catch (error) {
      handleError(error, 'createTenant')
    }
  }
}