Bugs in authentication in frontend

[gumityolcu]

I noticed 2 bugs in basic parts of the frontend.

1- Sign Out button doesn't have the right mouse cursor which doesn't feel like a clickable object.
2- No error is prompted if wrong password is entered. THIS IS ONE OF THE MOST BASIC AND IMPORTANT FUNCTIONALITIES IN A SOCIAL MEDIA PLATFORM. USER MAY NOT REALIZE THE PASSWORD IS WRONG AND JUDGE THAT THE WHOLE SYSTEM DOESN'T WORK, LIKE I DID.

[okyksl]

@didemongu ?

[gumityolcu]

Closing issue due to inactivity and lack of time.