title: How Can I SignUp new User with AWS cognito with Postman without using hosted UI
body: <p>Basically I want the below flow in the application .</p>
  <p>I have created one user pool in the cognito and configure it.</p>
  <p>I want to integrate cognito authentication and authorization with below flow.</p>
  <ol>
  <li>Register new user with by using cognito signUp api via postman (I dont want to use hosted UI) .</li>
  </ol>
  <p>once user is successfully registered in cognito.</p>
  <ol start="2">
  <li><p>User will call the cognito login api via postman - On successful login cognito will return access_token.</p>
  </li>
  <li><p>I will use that access token in all subsequent requests to make sure the user is authenticated and authorized .</p>
  </li>
  </ol>
  <p>The main thing here is I do not want to use that hosted UI given by cognito .I want to achieve this via api calls .</p>
  <p>I am not sure for achieving this what I need to . You can tell me if any more steps needed before the first step I wrote like authorize my app or anything like that.</p>
  <p>I understood I need to authorize my app before it uses the signup api  but I am not sure about exact flow and process or in which manner I need to perform the steps .</p>
  <p>Please guide..</p>