fix: error message display when email or password invalid and insufficient password length

[NChang55]

Description

Browser alerts with error messages to inform players when invalid email or password were entered upon login, also when new player tries to create new account with password fewer than 6 characters.

Card Link

https://3.basecamp.com/5802516/buckets/37608217/card_tables/cards/7512294908 https://3.basecamp.com/5802516/buckets/37608217/card_tables/cards/7511686873

Type of change

Please delete options that are not relevant.

• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] This change requires a documentation update

How Has This Been Tested?

Tested in browser localhost with both local servers running.

Checklist before requesting a review

• [x] I have performed a self-review of my code
• [x] I have commented my code, particularly in hard-to-understand areas
• [ ] I have added tests that prove my fix is effective or that my feature works
• [x] New and existing unit tests pass locally with my changes
• [x] Any dependent changes have been merged and published in downstream modules