admin /user in flutter

i dont have idea about how admin manage users and all how to make guys if ayone has theorical knowladge and all please can share me blog or etc too understand basic things please tell me

What do you mean with managing users?

If you mean deleting for example, an user, you will need an appwrite function

for example i had a app which has a admin and user both so how i first of all identify it is admin or user if there is no login available for user just login available for admin and how admin manage a work to upload items and all

You can assign permission: https://appwrite.io/docs/permissions

If you don't want (for example) allowing an user without a role accessing a page, you can do account.get(); and depending on the role redirect to another page