"sudo: no password was provided" when running an Ansible module with `local_action`

Question

I'm trying to use this github_key community module to add an SSH publickey to a Github account.

(I installed the community module with ansible-galaxy collection install community.general)

In my task list, I -

1. Read the publickey
2. Call github_key (with local_action) to add that key to the Github account

- name: Read SSH key for jeeves@github.com
  shell: 'cat /home/jeeves/.ssh/jeeves@github.com.pub'
  register: ssh_pub_key

- name: Upload SSH key for jeeves@github.com
  local_action:
    module: github_key
    name: 'Key for jeeves@my-server.dev'
    token: '{{ github_token }}'
    pubkey: '{{ ssh_pub_key.stdout }}'
    force: yes

When I run it get this error (in module_stderr output):

[sudo via ansible, key=<REDACTED>] password:
sudo: no password was provided
sudo: 1 incorrect password attempt

I guess it can't find my sudo password for the user.

But I am providing a sudo password, and there are 30+ other tasks before this (not shown here) where it was able to successfully execute commands. In fact in my playbook definition I use become:

- hosts: all
  become: yes
  become_method: sudo
  become_user: root
  gather_facts: yes
  #...

I think the issue is caused by local_action since it's having trouble even executing the module itself.

Thanks!