How to provide guest credentials when creating Move plan through API

I am able to create a Move plan using the API and Ansible for migrating a VM from vSphere to Nutanix. However, I am unable to specify the guest credentials for the guest operations (like removing VMware Tools from the replicated vm during the migration) in the actual rest call (see code below) as is possible using the GUI. I cannot find any way in the API documentation on how to get the credentials into the request. Hope somebody can assist.

- name: "Create Move Plan: Task 1.2a - Create Move Plan for OTA"
  uri:
    url: "https://{{ move_server_ota }}/move/{{ mapi_version }}/plans"
    method: POST
    validate_certs: no
    force_basic_auth: yes
    headers: 
      Authorization: "{{ move_token_ota }}"
    body_format: json
    body: |
      {
        "Spec": {
          "Name": "{{ move_host_name | lower }}",
          "NetworkMappings": [
            {
              "SourceNetworkID": "{{ move_source_network_id[0] }}",
              "TargetNetworkID": "{{ move_ota_target_network_uuid}}",
              "TestNetworkID": "{{ move_ota_test_network_uuid }}"
            },
            {
              "SourceNetworkID": "{{ move_source_network_id[1] }}",
              "TargetNetworkID": "{{ move_ota_target_network_uuid }}",
              "TestNetworkID": "{{ move_ota_test_network_uuid }}"
            }
          ],
          "Settings": {
            "GuestPrepMode": "Automatic",
            "SkipIPRetentionUI": false,
            "SkipUninstallGuestToolsUI": false
          },
          "SourceInfo": {
            "ProviderUUID": "{{ move_ota_source_provider_uuid }}"
          },
          "TargetInfo": {
            "AOSProviderAttrs": {
              "ClusterUUID": "{{ move_ota_target_cluster_uuid }}",
              "ContainerUUID": "{{ move_ota_target_container_uuid }}"
            },
            "ProviderUUID": "{{ move_ota_target_provider_uuid }}"
          },
          "Workload": {
           "Type": "VM",
            "VMs": [
              {
                "VMReference": {
                  "UUID": "{{ move_vm_uuid }}",
                  "VMID": "{{ move_vm_id }}"
                }
              }
            ]
          }
        }
      }
    return_content: yes
    timeout: 300
  register: move_respons