Creating P4 Credential In Jenkins VIA API

Question

I'm creating a playbook to set up a Jenkins master and wanted to use the Jenkins API to create a P4 credential with SSL enabled

I have tried various methods of setting ssl, eg "ssl": "true", "ssl": { "trust": " * fingerprint * " } but not having much luck

The below creates the basic credential but does not set the SSL and trust fingerprint

- name: Add Perforce Credential
  uri:
    method: POST
    url: 'http://{{ jenkins_hostname }}:{{ jenkins_http_port }}credentials/store/system/domain/_/createCredentials/'
    user: "{{ jenkins_admin_username }}"
    password: "{{ jenkins_admin_password }}"
    force_basic_auth: yes
    status_code: 302
    validate_certs: no
    headers:
      Jenkins-Crumb: "{{ crumb.content.split(':')[1] }}"
    body: |
      json={
        "": "0",
        "credentials": {
          "scope": "GLOBAL",
          "id": "{{ credential_p4 }}",
          "username": "{{ credential_p4 }}",
          "password": "{{ credential_p4_password }}",
          "description": "{{ credential_p4 }} Credential",
          "p4port": "{{ credential_p4_port }}",
          "stapler-class": "org.jenkinsci.plugins.p4.credentials.P4PasswordImpl"
        }
      }

Typically my efforts have resulted in the following error

Caused by: java.lang.IllegalArgumentException: Unable to convert to class org.jenkinsci.plugins.p4.credentials.TrustImpl

Any pointers to where I'm going wrong

Thanks