Steps for Inbound Call to IVR

Hi Wazo Community
I’m quite new to wazo-platform API and would love to make an Inbound Call to an IVR configured on Wazo.
This is what I have tried (but not working):

  1. Create Sound Category
  2. Upload IVR Sound Files
  3. Create IVR
  4. Create Context (of type Incall)
  5. Create Trunk (with Context in 4 above)
  6. Create Incall (with destination == IVR in 3 above)
  7. Create Extension (with Context in 4 above)
  8. Associate Incall [in 6] with Extension [in 7]

After doing the above, I still get 401 Unauthorised.
Please can someone help guide with missing steps?