and ultimately for my purpose I might be able to avoid the need for the

.then()

closure altogether by constructing the

newFixture

object directly in the command I want to consume it in like

cy.signup('user1').as('user1Id');
cy.signup('user2').as('user2Id');

// Use ids in new command
cy.otherApiRequest({
  aForeignKey: this.user1Id,
  anotherForeignKey: this.user2Id,
});