omniauth strategy

app/models/user.rb

@@ -0,0 +1,9 @@
+class User < ApplicationRecord
+
+  def self.from_omniauth(auth_hash)
+    user = find_or_create_by(uid: auth_hash['uid'], provider: auth_hash['provider'])
+    user.name = auth_hash['info']['name']
+    user.save!
+    user
+  end
+end