Fix login and signup forms

[kunal2812]

The primary task is to remove the background from both forms to make the page visually appealing.

Note:

• Create a new branch for every task to isolate changes
• Start working on the issue only when it is assigned to you
• Submit the PR on time, no extra time will be allotted

[dhruvm911]

sir can you assign this issue to me?

[kunal2812]

Please request through Contrihub