Dont show users of admins and other vendors

[HadiSDev]

In the Vendor Admin Panel under users we don't want to show any other user other than the vendor team:

[HadiSDev]

I also realized that the role is wrong. It is set to Admin. Big security risk

[vholik]

Role admin only applies to the store it does not applies for the whole marketplace. There is is_admin column in users table that differentiates admins from vendors.