I am looking for tutorial or sample for Dapper using token based authentication in web api 2. I appreciate if anyone can suggest where to start, I have found tutorial in http://www.c-sharpcorner.com/UploadFile/ff2f08/token-based-authentication-using-Asp-Net-web-api-owin-and-i/ but the sample is using EF and I havent tried using EF, but dapper also I am using MySQL for my database. Thanks in advance and good day.
Dapper is a very different tool to EF (which is the DbContext described in your step 3 / step 4). It simply will not be compatible with those steps, and isn't designed to be used with those steps.
But here's the thing: dapper is just a tool. EF is just a tool. It is ok to use more than one tool. If it suits your purposes, then use EF to do one set of jobs (for example, to help you use a particular library that is designed with that in mind), and use another tool (such as dapper) elsewhere in the same project. That's OK. No one will mind.
If you really really don't want to use EF at all, then you'll need to find out everything that the library needs to support what you are doing, and implement it manually. If the library is designed around IQueryable<T> etc, then this may be very difficult.