Test: Signup viewmodel

[paul2126]

PR Title: Signup viewmodel Test

Related Issue(s):

• Auth repository test가 에러때문에 실행이 안 되어서 주석처리 했습니다

PR Description:

• Signup viewmodel Test

Changes Included:

• Added new feature(s)
• Fixed identified bug(s)
• Updated relevant documentation

Notes for Reviewer:

• Auth repository test가 에러때문에 실행이 안 되어서 주석처리 했습니다

Reviewer Checklist:

• Code is written in clean, maintainable, and idiomatic form.
• Automated test coverage is adequate.
• All existing tests pass.
• Manual testing has been performed to ensure the PR works as expected.
• Code review comments have been addressed or clarified.

Additional Comments:

Add any other comments or information that might be useful for the
review process.

[89645321]

여기도 coverage가 33 75 67로 뜨는데 class coverage(33)는 신경 안 써도 될 것 같고 line coverage 높일 수 있으면 높여주시면 감사하겠습니다! 힘들면 안 해도 될 것 같긴 해요

[JH747]

method coverage 80 근접하니 이대로 머지하겠습니다.
고생하셨습니다.