[BUG] Improve Login Flow

[DMalone87]

Describe the bug
When logging in on Firefox, an error occurs that prevents a the login from completing successfully. The error message isn't very clear; "Something went wrong. Please try again." After a second attempt, you the login completes normally. We should improve this error message and try and fix this bug.

To Reproduce
Steps to reproduce the behavior:

1. Your account should already have been created.
2. Navigate to the login page. dev.nationalpolicedata.org/login.
3. Fill in your credentials and attempt to log in.
4. See error.

Expected behavior
The login should succeed on the first attempt if a valid username and password pair are entered.

Screenshots

Desktop (please complete the following information):

• OS: [MacOS]
• Browser: [Safari, Firefox, Chrome]

Additional Context

• When cache is disabled, 4 attempts are required before a successful login.
• API returns a 422 error.
• Error message says "Signature verification failed"