Unable to create authentications via REST for ansible tower 3.6 that only supports API version v2.

[valaparthvi]

Description:
Creating authentications via REST fails for ansible tower 3.6 that only supports API version v2.

POST /api/authentications
{
	"action": "create",
	"resources": [
		{
			"description": "TestDescription",
			"name": "test_credentials_36",
			"related": {},
			"user": 1,
			"userid": "foo",
			"password": "foo",
			"host": "baz_36",
			"type": "ManageIQ::Providers::AnsibleTower::AutomationManager::VmwareCredential",
			"manager_resource": {
				"href": "https://192.168.122.33/api/providers/6"
			}
		}
	]
}
Response:
{
  "results": [
    {
      "success": true,
      "message": "Creating Authentication",
      "task_id": "35",
      "task_href": "https://192.168.122.33/api/tasks/35"
    }
  ]
}

GET /api/tasks/35
Reponse : 
{
  "href": "https://192.168.122.33/api/tasks/35",
  "id": "35",
  "name": "Creating Ansible Tower Credential (name=test_credentials_36)",
  "state": "Finished",
  "status": "Error",
  "message": "{\"credential_type\":[\"This field is required.\"]}",
  "userid": "system",
  ...
  ...
  ...
  "actions": [
    ...
    ...
  ]
}

1. Is there an existing issue already reported or any related bugzilla?
   https://bugzilla.redhat.com/show_bug.cgi?id=1794047

2. Severity: High

3. Version: 5.11.8.0
   Note: I believe this issue has existed since the beginning. We started testing with ansible tower 3.6 recently and discovered this bug and for other tower providers that we have, we use v1.

[agrare]

Thanks for the bug report @valaparthvi! What version of MIQ are you using?

[valaparthvi]

Hi @agrare I updated the description, sorry I forgot to mention that earlier.

Version: 5.11.8.0
Note: I believe this issue has existed since the beginning. We started testing with ansible tower 3.6 recently and discovered this bug and for other tower providers that we have, we use v1.