Create multiple models in device and apply omniauth-facebook to each

I was able to create multiple models (teacher.rb/student.rb) using the device.
Also, I would like to implement omniauth using omniauth-facebook, but the device's omniauthable conflicts and does not work.
In this case, what is the appropriate approach?
What do you think of creating the third model omniuser.rb and concentrating the process on it?
I would like to know the method and the website that I can refer to.
Thank you for your cooperation.