fix: prevent user credentials to persist on login screen after logout & provide UI feedback on short password entry

[AyaNady17]

Description:

• When a user logs out of the app, their credentials (such as email and password) should not persist on the login screen. Currently, after logging out, the text fields still retain the user’s information, which is undesirable.

• When a user attempts to authenticate by entering a short password and pressing the login button, there is no feedback provided on the User Interface (UI) of the application. The only indication of an error is an exception that appears in the debug console.

Solution:

• Cleared Text Field Controllers: After a successful login, I ensured that the text field controllers (for email and password) are cleared. This prevents the previous user’s credentials from being displayed when the login screen is revisited.

• Implement a snack bar notification or an alert that informs the user when the entered password is too short.

Fixes #260 Fixes #259

Type of change

• [x] Bug fix (non-breaking change which fixes an issue)

How Has This Been Tested?

• first bug: I thoroughly tested the behavior by logging in, logging out, and verifying that the text fields are empty upon returning to the login screen.
• second bug: entered valid email with uncompleted password (less than 8 characters) and verify here is a Ui feedback

Before Fix

• first bug : https://github.com/AOSSIE-Org/Resonate/assets/144162711/5dcf6521-14d0-4f94-b2cc-cff0a99b7708
• second bug: https://github.com/AOSSIE-Org/Resonate/assets/144162711/189cc236-8670-4b89-a37d-e978fc90c64e

After Fix

• first bug : https://github.com/AOSSIE-Org/Resonate/assets/144162711/8f1e39f9-34d5-40cd-8de9-5107999f96ed
• second bug: https://github.com/AOSSIE-Org/Resonate/assets/144162711/a698fe11-9dfb-4182-96de-30929262f6c4

Checklist:

• [x] My code follows the style guidelines of this project
• [x] I have performed a self-review of my own code
• [x] I have commented my code, particularly in hard-to-understand areas
• [ ] I have made corresponding changes to the documentation
• [x] My changes generate no new warnings
• [ ] I have added tests that prove my fix is effective or that my feature works
• [ ] New and existing unit tests pass locally with my changes
• [ ] Any dependent changes have been merged and published in downstream modules
• [x] I have checked my code and corrected any misspellings

Maintainer Checklist

• [ ] closes #xxxx (Replace xxxx with the GitHub issue number)
• [ ] Tag the PR with the appropriate labels

[AyaNady17]

@jddeep please review my code and tell me if I have to modify anything :)

[AyaNady17]

@chandansgowda please review so I can edit any comments ASAP

[AyaNady17]

there was some conflicts and I've solved them, now the branch is ready to be merged @chandansgowda