Ansible bigip - confirm only two local user accounts

Greetings. For security compliance purposes I'm trying to confirm that only two local user accounts exist on each F5 but not having any luck. Below are the two methods I've tried and the error messages. Any help would be greatly appreciated.

Ansible 2.9.1

---
- name: check security compliance on F5s
  hosts: testGroup
  connection: local
  gather_facts: no
  vars:
    providerA:
      password: "{{ password }}"
      server: "{{ ansible_host }}"
      user: "{{ user }}"      
      validate_certs: False  
  
  tasks:
    - name: local users
      bigip_command:
        commands: list auth user
        provider: "{{ providerA }}"
      register: local_users
  
    - name: confirm only two user accounts exist
      debug:
        msg: "only two user accounts exist"
      when: local_users.stdout.find('auth user') == 2

{

  "msg": "The conditional check 'local_users.stdout.find('auth user') == 2' failed. The error was: error while evaluating conditional (local_users.stdout.find('auth user') == 2): 'list object' has no attribute 'find'\n\nThe error appears to be in '/tmp/bwrap_1407122_vqhuv58l/awx_1407122_2ajau8cz/project/ansible-f5-security-compliance/playbooks/main.yml': line 20, column 7, but may\nbe elsewhere in the file depending on the exact syntax problem.\n\nThe offending line appears to be:\n\n\n  - name: confirm only two user accounts exist\n   ^ here\n",

  "_ansible_no_log": false

}

---
- name: check security compliance on F5s
  hosts: testGroup
  connection: local
  gather_facts: no
  vars:
    providerA:
      password: "{{ password }}"
      server: "{{ ansible_host }}"
      user: "{{ user }}"      
      validate_certs: False
  
  tasks:
    - name: local users
      bigip_device_info:
        gather_subset:
          - users
        provider: "{{ providerA }}"
      register: local_users
  
    - name: confirm only two user accounts exist
      debug:
        msg: "only two user accounts exist"
      when: local_users.stdout.find('full_path') == 2

{

  "msg": "The conditional check 'local_users.stdout.find('full_path') == 2' failed. The error was: error while evaluating conditional (local_users.stdout.find('full_path') == 2): 'dict object' has no attribute 'stdout'\n\nThe error appears to be in '/tmp/bwrap_1407131_x5we4dg9/awx_1407131_pmwj_q1j/project/ansible-f5-security-compliance/playbooks/main.yml': line 21, column 7, but may\nbe elsewhere in the file depending on the exact syntax problem.\n\nThe offending line appears to be:\n\n\n  - name: confirm only two user accounts exist\n   ^ here\n",

  "_ansible_no_log": false

}