What about this?
There are several things to have in account (hardware and tags to be read), but you may test with a simple project if it works reading your cards.
This blog has useful information. Don't miss the comments.
I want to say a very big thank you for your response. Gone through the website and the plugin. My headache now is how to authenticate the user or pass on the tag id to make sure it has authorized access from the host.
Your question is big, do you already have a database with authorized users? Which one is?
The process may be simple, the phone reads RFID info, take some prompted data from de user, validate it against the database and give an answer displayed by the app.
What do you need to know?