Refactor current user logic.

[jtorreggiani]

Ticket Description

#260

Description of Changes

Incremental improvements to address auth flow issues on mobile.

Before and After for UI Updates

No UI changes.

For PR Reviewer

• Does this file change the yarn.lock, package.json or package-lock.json file? If so, why?
• If this pr contains mobile and desktop changes, did you test on IphoneXr and desktop views?
• Does this file match the related tickets linked figma file, or does it pass the visual smell test?
• If this file contains javascript, does the javascript pass the smell test?
• If you don't feel super confident in your review, did you assign someone more senior to double check?