REST API example change password

---
- name: View and Update user
  hosts: f5
  connection: local
  gather_facts: false

  tasks:

  - name: Login via uri Get token
    tags: basic
    ansible.builtin.uri:
      url: 'https://{{ ansible_host }}/mgmt/shared/authn/login'
      return_content: true
      force_basic_auth: true
      method: POST
      body_format: json
      body: "{ \"username\": \"admin\", \"password\": \"S3cretP@55word!\", \"loginProviderName\": \"tmos\"}"
      headers:
        Content-Type: application/json
      validate_certs: false
    register: token

  - name: Show token
    tags: basic
    debug:
      var: token.json.token.token

  - name: View users
    tags: basic
    ansible.builtin.uri:
      url: 'https://{{ ansible_host }}/mgmt/tm/auth/user/cwise'
      headers:
        Content-Type: application/json
        X-F5-Auth-Token: "{{ token.json.token.token }}"
      method: GET
      return_content: true
      validate_certs: false
    register: users

  - name: Show user cwise
    tags: basic
    debug:
      var: users

  - name: Update user passwd
    ansible.builtin.uri:
      url: 'https://{{ ansible_host }}/mgmt/tm/auth/user/cwise'
      headers:
        Content-Type: application/json
        X-F5-Auth-Token: "{{ token.json.token.token }}"
      method: PATCH
      body: "{\"password\": \"n3w5ecret!\"}"
      body_format: json
      validate_certs: false

An Ansible example