Authentication using Token With Devise Rails

Question

Staff need help implementing authentication by token, I already created the models, the application is working properly, now I need to improve security. The customer will send me registration and a password, she will come in JSON, has a method that makes a select in the database to check if registration and password are true, I would like to generate a token once a day as soon as registration and password are confirmed. This token will return together with the ID to the device , via JSON, and in the next operations all will be validated with this token.

This is my consultation model

class Student < ApplicationRecord
    has_many :simulated
    has_many :proof



        #Metodo que recebe matricula e senha para validar acesso

        def sqlValidatedLogin(registration,password)
        query_student = "SELECT id, name, token registration FROM students WHERE registration = "+
        registration+" AND password = "+password
        ActiveRecord::Base.connection.execute(query_student)
        end
end

# method in the controller

 def index
  student = Student.new
  return_dados = student.sqlValidatedLogin(params[:registration].to_s,params[:password].to_s)
  render :json => return_dados
  end

Access to return data

http://127.0.0.1:3000/Students? Registration=102030&password=%27123%27

I’m wondering how to implement in the other classes, I read the documentation however, I didn’t understand token authentication, someone would have an example configuration with comments, or could help me implement this ?