Creating Login with Token

Hi,

I am wondering if anyone could point me in the correct direction of tutorials on how to create something like the following:

I have a simple logon screen, Username Password capure.

I have created a SQL server DB with a table with fields, userID, uName, UPassword etc.

How could i once i have checked the user is valid and passes authertication create a Token of some sort. This is new to me and reading up im guessing this is something like Oauth?

Does anyone have any good articals or tutorials to help me? Or tell me what my best route would be. THanks very much if you can help.

Thanks,

Tommy