if (!existingServicePrincipal) {
                  // Get token for graph API and create application object + service principal
                  return from(this.getTokenForGraphApi()).pipe(
                    mergeMap((graphToken: string) => [
                      this.subscriptionLinkerService.postApplicationObject(
                        graphToken
                      ),
                      graphToken
                    ]),
                    mergeMap(([appId, graphToken]) => {
                      existingServicePrincipal = new ServicePrincipal();
                      existingServicePrincipal.subscriptionId = [];
                      existingServicePrincipal.tenantId = this.selectedTenant.tenantId;
                      existingServicePrincipal.activeSubscription = this.selectedSubscription.azureId;
                      existingServicePrincipal.clientId = appId;
                      existingServicePrincipal.clientSecret = Guid.newGuid();
                      return this.subscriptionLinkerService.createPrincipal(
                        existingServicePrincipal,
                        graphToken
                      );
                    })
                  );
                }