added the previous changes regarding the frontend

proceedig from where I left off

removed the hashing from the user model's file which had caused a failed login becuase the passwords and salts could not match

bug fixed on fontend

fixed the issue where the error if the error on the sigup form was showing as a json object,

fixed the background colors based to be displayed based on whether the notification was an error or a message

created a new file for interfaces and trasfered the logic of the signup form from the component to the service file

refactored the signup component to display the errors in the notification

added a notifications compoment to display the error messages from the responses

changed the input fnot color from white to black

returned the errors from the server, moved the fetch logic to the services folder etc ...

removed unwanted extra lines

moved the error handling middleware to the bottom of the routers to be able to get the json errors

reverted the throw errow statements

refactored to removed unnecessary extra code