I have just created REST API to allow administrator managing data user from ASP.NET Web API, this has an authentication OAUTH2 bearer token with OWIN package.
You can manage data user if he has got token bearer while token is not expired. I set token expired for 15 minutes, you can change it as you as want. Not only text, but also you can upload image file to server and save filename into database via REST API.
Make sure you have installed:
- Visual Studio 2015 (or higher)
- SQL Server 2012
- Net framework 4.5.2
- Postman (Last version)