Distinct username and logins

I ran Security Assist Wizard to create a users registration, login, etc.

Is there a tutorial about how to make sure when a user logs in....
That the username is exact as to what is in the db.

After I ran the wizard.
A user can login without matching exactly....

For example:
someone who registers with the username. apple fritters
can log in.... Apple Fritters, aPPle friTTers. etc....

What changes do I need to make, and to what pages to make this be distinct?

Thank you in advance...:)

case sensitivity is determined by the collation that a table or column is created with.

The default collation for most mySQL Server is latin1_swedish_ci which is not case sensitive.

you can change the collation to latin1_bin which is case sensitive.

In PHPMyAdmin, you change the collation by editing the column properties.

Thank you very much~!
That did the trick.
Great quick fix. :)

does this same theory apply to the password field also?

yes, same applies to the password field.