can't login to the admin panel

[ZAHID188]

everything is running alright except admin panel. I have created superuser succesfully. But when I go to login in admin panel ,
It shows- Please enter the correct username and password for a staff account. Note that both fields may be case-sensitive.

when I run this.
PS C:\Users\zahid\Desktop\clean\WEBSITE_DEV\python\gittemplate\zahid\Django-School-Management> python manage.py runserver
C:\Users\zahid\Desktop\clean\WEBSITE_DEV\python\gittemplate\zahid\Django-School-Management\config\settings.py:173: UserWarning: SQLite URL contains host component '..', it will be ignored
'default': env.db(),
C:\Users\zahid\Desktop\clean\WEBSITE_DEV\python\gittemplate\zahid\Django-School-Management\config\settings.py:173: UserWarning: SQLite URL contains host component '..', it will be ignored
'default': env.db(),
Watching for file changes with StatReloader
Performing system checks...

System check identified no issues (0 silenced).
May 18, 2021 - 01:57:01
Django version 2.2.13, using settings 'config.settings'
Starting development server at http://127.0.0.1:8000/
Quit the server with CTRL-BREAK.