How to login with other than tc user

[malikawan]

I create a user name malik with command sudo adduser malik and then give password and then i copy passwd and shadow file on boot to /etc folder it work great with user tc and ask me for password but when i login with user malik it say user is not in sudouser how i login with malik.
Basically i use malik as normal user in which no sudo command work and as admin i use tc user
any idea plz
Thanx in advance

Malik Awan

[gerald_clark]

The problem is with the "startx" command in .profile.

[malikawan]

Is there any way to restrict or prevent the use of sudo command with out password?