add: trace users and get trace token

db/migrate/20220331031530_create_trace_users.rb

@@ -0,0 +1,17 @@
+class CreateTraceUsers < ActiveRecord::Migration[5.2]
+  def change
+    create_table :trace_users do |t|
+      t.references :user 
+      t.string :username 
+      t.string :password
+      t.string :unit 
+      t.string :telnumber
+      t.string :email 
+      t.string :name
+      t.text :token
+      t.datetime :expired_at
+
+      t.timestamps
+    end
+  end
+end