Member Content: Tags: Use Signed Subscriber ID

[n7studios]

Summary

The wordpress/profile API endpoint now returns a subscriber's tags, which allows the Kit Plugin to support checking if a signed subscriber ID has access to a tag, In cases where subscribers access member content gated by a product (via the Kit Plugin, signed subscriber ID only) and then switch to content gated by a tag.

This also reduces an additional API request when a signed subscriber ID is stored in the cookie

Testing

• testRestrictContentByTagUsingSignedSubscriberID: Test that a subscriber has access to content when gated by tag using a signed subscriber ID.
• Added testRestrictedContentByTagOnFrontendUsingSignedSubscriberID helper method to assert a signed subscriber ID that is subscribed to a tag is granted access to the content, and a signed subscriber ID that is not subscribed to a tag is not granted access to the content
• Updated testRestrictedContentByTagOnFrontend helper method to assert a subscriber ID that is not subscribed to a tag is not granted access to the content.

Checklist

• I have written a test and included it in this PR
• I have run all tests and they pass
• The code passes when running the PHP CodeSniffer
• Code meets WordPress Coding Standards for PHP, HTML, CSS and JS
• Security and Sanitization requirements have been followed
• I have assigned a reviewer or two to review this PR (if you're not sure who to assign, we can do this step for you)