MBL-1170: Get token and User, Log in flow completed.

[Arkariang]

📲 What

• Obtain token from new Endpoint
• Once the token is ready, call to fetch the user
• Once token and user responses are successful, persist on CurrentUser both

🤔 Why

• OAUth take a look at the eng plan https://kickstarter.atlassian.net/wiki/spaces/NT/pages/2562424940/OAuth+2.0+in+Android+with+custom+Tabs#Phase-3%3A-~(2-3)-points

🛠 How

• Added new endpoint to obtain the token
• Added new endpoint to obtain the user (will be removed on following tickets, once we sent token for V1 as header and not a query param)

👀 See

LoginFlow.mp4

| | |

📋 QA

• Log in, if you are logged in on the website as well, ChormeTab will not prompt you with the formulary, if you are are not logged in on the website, ChromeTab will prompt you the formulari

Story 📖

MBL-1170

[Arkariang]

FYI: This method will be removed on following tickets, the token is gonna be sent as header and not query param.

[codecov-commenter]

Codecov Report

Attention: 85 lines in your changes are missing coverage. Please review.

Comparison is base (81d14a6) 73.94% compared to head (8405043) 73.74%.

Files	Patch %	Lines
...a/com/kickstarter/services/apirequests/PKCEBody.kt	0.00%	37 Missing ⚠️
.../kickstarter/services/apirequests/UserTokenBody.kt	0.00%	23 Missing ⚠️
.../java/com/kickstarter/viewmodels/OAuthViewModel.kt	70.58%	5 Missing and 5 partials ⚠️
...tarter/services/apiresponses/OAuthTokenEnvelope.kt	66.66%	7 Missing ⚠️
...om/kickstarter/viewmodels/usecases/LoginUseCase.kt	33.33%	6 Missing ⚠️
...a/com/kickstarter/viewmodels/LoginToutViewModel.kt	80.00%	0 Missing and 2 partials ⚠️

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Additional details and impacted files

@@             Coverage Diff              @@
##             master    #1954      +/-   ##
============================================
- Coverage     73.94%   73.74%   -0.21%     
- Complexity     1976     1986      +10     
============================================
  Files           344      347       +3     
  Lines         19819    19944     +125     
  Branches       2759     2770      +11     
============================================
+ Hits          14656    14707      +51     
- Misses         3546     3616      +70     
- Partials       1617     1621       +4     

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