feat: add builder method to add optional user param for auth url

[allisonc07]

Asana: https://app.asana.com/0/1206922837439776/1206699517630752

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 0% with 2 lines in your changes are missing coverage. Please review.

Project coverage is 68.78%. Comparing base (fdf5cc6) to head (08025d6).

Additional details and impacted files

[](https://app.codecov.io/gh/smartcar/java-sdk/pull/144?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=smartcar) ```diff @@ Coverage Diff @@ ## master #144 +/- ## ============================================ - Coverage 68.91% 68.78% -0.14% Complexity 238 238 ============================================ Files 50 50 Lines 1007 1009 +2 Branches 70 70 ============================================ Hits 694 694 - Misses 279 281 +2 Partials 34 34 ``` | [Flag](https://app.codecov.io/gh/smartcar/java-sdk/pull/144/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=smartcar) | Coverage Δ | | |---|---|---| | [integration](https://app.codecov.io/gh/smartcar/java-sdk/pull/144/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=smartcar) | `55.30% <0.00%> (-0.11%)` | :arrow_down: | | [test](https://app.codecov.io/gh/smartcar/java-sdk/pull/144/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=smartcar) | `46.48% <0.00%> (-0.10%)` | :arrow_down: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=smartcar#carryforward-flags-in-the-pull-request-comment) to find out more. | [Files](https://app.codecov.io/gh/smartcar/java-sdk/pull/144?dropdown=coverage&src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=smartcar) | Coverage Δ | | |---|---|---| | [src/main/java/com/smartcar/sdk/AuthClient.java](https://app.codecov.io/gh/smartcar/java-sdk/pull/144?src=pr&el=tree&filepath=src%2Fmain%2Fjava%2Fcom%2Fsmartcar%2Fsdk%2FAuthClient.java&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=smartcar#diff-c3JjL21haW4vamF2YS9jb20vc21hcnRjYXIvc2RrL0F1dGhDbGllbnQuamF2YQ==) | `64.91% <0.00%> (-1.16%)` | :arrow_down: | ------ [Continue to review full report in Codecov by Sentry](https://app.codecov.io/gh/smartcar/java-sdk/pull/144?dropdown=coverage&src=pr&el=continue&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=smartcar). > **Legend** - [Click here to learn more](https://docs.codecov.io/docs/codecov-delta?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=smartcar) > `Δ = absolute (impact)`, `ø = not affected`, `? = missing data` > Powered by [Codecov](https://app.codecov.io/gh/smartcar/java-sdk/pull/144?dropdown=coverage&src=pr&el=footer&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=smartcar). Last update [fdf5cc6...08025d6](https://app.codecov.io/gh/smartcar/java-sdk/pull/144?dropdown=coverage&src=pr&el=lastupdated&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=smartcar). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=smartcar).