Implementation of Password Security with bcrypt Hashing

[01bps]

What:

This PR introduces the use of bcrypt for secure password hashing in the authentication system. It replaces plain-text password verification with bcrypt checks, ensuring that passwords are stored and verified securely.

Why:

Previously, passwords were stored in plain text, posing security risks.
This implementation strengthens authentication by:

• Ensuring passwords are hashed before storage.
• Using unique salts for each password to to increase security and prevent hash collisions.
• Verifying passwords securely with bcrypt.

How:

• Introduced bcrypt in userdatahandler.py to hash passwords before storing them.
• Updated the create_user() function to hash passwords before saving.
• Modified the get_password_by_username() function to return the hashed password.
• Ensured the login authentication checks both hashed and plain-text passwords, allowing seamless transition for users with older accounts.

Key Changes:

• Added bcrypt import to handle password hashing.
• Updated create_user() to hash the password before storing it.
• Modified get_password_by_username() to return the hashed password.
• Updated the login route to verify passwords securely using bcrypt.checkpw()

Previously:

Now,the password of new users will be stored as:

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[01bps]

I’ve made sure that the login authentication checks both hashed and plain-text passwords, ensuring a smooth transition for users with older accounts.
If necessary, we can remove this before deployment to fully transition to using only hashed passwords.

@pradeeban This PR is ready for review.