user module can't handle password expiration parameters correctly

[ccdeville]

Summary

When using the user module to modify password_expire_min=0, the processing result does not meet expectations .
I guess the problem is caused by the following code in the user module.

    # deal with password expire min
    if user.password_expire_min:
        if user.user_exists():
            (rc, out, err) = user.set_password_expire_min()

Modifying to the following code may fix this problem.

    # deal with password expire min
    if user.password_expire_min is not None:
        if user.user_exists():
            (rc, out, err) = user.set_password_expire_min()

Issue Type

Bug Report

Component Name

user

Ansible Version

$ ansible --version
ansible [core 2.11.1] 
  config file = None
  configured module search path = ['/home/betadmin/.ansible/plugins/modules', '/usr/share/ansible/plugins/modules']
  ansible python module location = /app/python3/lib/python3.8/site-packages/ansible
  ansible collection location = /home/betadmin/.ansible/collections:/usr/share/ansible/collections
  executable location = /app/python3/bin/ansible
  python version = 3.8.5 (default, Sep 18 2020, 14:55:53) [GCC 4.8.5 20150623 (Red Hat 4.8.5-16)]
  jinja version = 2.11.2
  libyaml = False

Configuration

$ ansible-config dump --only-changed

OS / Environment

RHEL 7.4

Steps to Reproduce

• name: Edit password_expire_min
  user:
  name: test
  password_expire_min: 0

Expected Results

Minimum number of days between password change : 0

Actual Results

Minimum number of days between password change : 2

Code of Conduct

• I agree to follow the Ansible Code of Conduct

[ansibot]

Files identified in the description:

• lib/ansible/modules/user.py

If these files are incorrect, please update the component name section of the description or use the !component bot command.

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[lucab85]

I can reproduce the bug with

ansible --version
ansible [core 2.11.6] 
  config file = None
  configured module search path = ['/Users/lberton/.ansible/plugins/modules', '/usr/share/ansible/plugins/modules']
  ansible python module location = /usr/local/Cellar/ansible/4.7.0_1/libexec/lib/python3.10/site-packages/ansible
  ansible collection location = /Users/lberton/.ansible/collections:/usr/share/ansible/collections
  executable location = /usr/local/bin/ansible
  python version = 3.10.0 (default, Oct 13 2021, 06:45:00) [Clang 13.0.0 (clang-1300.0.29.3)]
  jinja version = 3.0.2
  libyaml = True