Fix NewPlayer function arguments

[mochizuki-pg]

Description

NewPlayer function arguments in the latest package documentation are different from the GitHub repository.
https://pkg.go.dev/github.com/OneSignal/[email protected]?utm_source=gopls#NewPlayer

Also, if you don't explicitly pass the AppId to the structure,
internal API processing, an error will occur that app_id is not found.

Details

Motivation

REQUIRED - Why is this code change being made? Or what is the goal of this PR? Examples: Fixes a specific bug, provides additional logging to debug future issues, feature to allow X.

Scope

RECOMMEND - OPTIONAL - What is intended to be effected. What is known not to change. Example: Notifications are grouped when parameter X is set, not enabled by default.

OPTIONAL - Other

OPTIONAL - Feel free to add any other sections or sub-sections that can explain your PR better.

Testing

Manual testing

Before

DefaultApi.CreatePlayer`: 400 Bad Request
"errors":["app_id not found. You may be missing a Content-Type: application/json header."]

After

Checklist

Overview

• I have filled out all REQUIRED sections above
• PR does one thing
  • If it is hard to explain how any codes changes are related to each other then it most likely needs to be more than one PR
• Any Public API changes are explained in the PR details and conform to existing APIs

Testing

• I have personally tested this on my device, or explained why that is not possible

Final pass

• Code is as readable as possible.
  • Simplify with less code, followed by splitting up code into well named functions and variables, followed by adding comments to the code.
• I have reviewed this PR myself, ensuring it meets each checklist item
  • WIP (Work In Progress) is ok, but explain what is still in progress and what you would like feedback on. Start the PR title with "WIP" to indicate this.