Resolve issue accessing pin code before running thread.

[montaguethomas]

Description

Resolves issue accessing pin code before running the wait thread for MyPlexPinLogin.

Fixes #1566

Type of change

• Bug fix (non-breaking change which fixes an issue)

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have added or updated the docstring for new or existing methods
• I have added tests when applicable

[JonnyWong16]

Thanks.