FCL Feature: Simplify `currentUser` syntax

[srinjoyc]

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Description (Problem Statement)

Simplify the syntax of the fcl.currentUser function into a class or object.

Experience Required (Team Required)

• JS and familiarity with FCL fcl.currentUser

Minimum Feature Set (Acceptance Criteria)

• Upon successful completion the following should be true:

import {currentUser} from "@onflow/fcl"

// before
currentUser().subscribe(callback)
// after
currentUser.subscribe(callback)

// before
currentUser().snapshot()
// after
currentUser.snapshot()

// before
currentUser().authenticate
// after
currentUser.authenticate

// before
currentUser().authorization
// after
currentUser.authorization

// before
currentUser().asArg
// after
currentUser.asArg

Milestone Requirements

• Update fcl.currentUser() from function to Class or Object syntax
• Add/Update tests
• Update Documentation - Add a description for this feature including sample code for usage in the existing API Docs

Software Requirements

• Code should be written with best practices in mind.
• Other Requirements - Error Reporting
  • Throw descriptive exceptions on errors
  • Prints a clear error message to the browser console
• All core logic should have unit tests. Include tests for success on valid data and failure

Other Requirements

• Updated Documentation describing the code, and usage

Judging Criteria

• For all projects, technical & high-level judging criteria apply.

Resources

• Existing Issue

[gregsantos]

Hello folks! I'm Greg 👋🏼 😎 A Senior Javascript Developer on the DevEx Team.
If you choose this issue, I'll be your primary Point of Contact for any questions on implementation, code reviews, and/or help getting it over the finish line. Thanks for participating and Good Luck!