Add public get tags method

[jinliu9508]

Description

One Line Summary

Add a public getTags method

Details

Motivation

Provide a public getTags upon request

Scope

We are only returning the local tags

Testing

Unit testing

Add one unit test to ensure the data is the same

Manual testing

I ran it in an emulator, added a tag, and the call of getTags returns that tag

Affected code checklist

• Notifications
  • Display
  • Open
  • Push Processing
  • Confirm Deliveries
• Outcomes
• Sessions
• In-App Messaging
• REST API requests
• Public API changes

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 included test coverage for these changes, or explained why they are not needed
• All automated tests pass, or I explained why that is not possible
• 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.

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This change is 

[emawby]

This looks great! I believe the code is correct, but for future proofing lets add a test where the user changes (causing the tags to change) and verify that when we switch users we get the updated tags.

[jinliu9508]

@emawby Good point! A new test case for tags modification is added in this PR. Please have a look!

[emawby]

It looks like the linter is failing. You may need to rebase since changes were merged that fix linting

[shepherd-l]

I noticed that the linter check is still failing, could you fix the linter indentation errors in UserManagerTests?

Also just a nit but, I think the Migration Guide could be updated to include getTags in the API Reference section

[jinliu9508]

I noticed that the linter check is still failing, could you fix the linter indentation errors in UserManagerTests?

Also just a nit but, I think the Migration Guide could be updated to include getTags in the API Reference section

@shepherd-l Thanks, Shepherd! I have fixed the linter error and added 'getTags' in the Migration Guide. Please have a look.

[shepherd-l]

Looks good to me!

Reviewed 1 of 3 files at r2.
Reviewable status: 1 of 4 files reviewed, all discussions resolved (waiting on @jennantilla, @jkasten2, and @nan-li)