I apply aws-amplify to my project but I want to modify signIn, signUp and other components of aws-amplify. exactly, when I try to use aws-amplify, I didn't have a choice but to use this view. <img width="280" alt="amplify" src="https://user-images.githubusercontent.com/22615385/33227685-ef1b8244-d1eb-11e7-904f-527fc6be83e3.png">