How to integrate amazon cognito login in postman

amazon-cognitopostman

I was using Amazon Cognito user pool for login. When I access my web application, I get a redirect to

https://<domain>.auth.<region>.amazoncognito.com/login?response_type=code&client_id=<client id>&redirect_uri=<callback> .

Once logged in with the username/password of a user from the pool, I will be redirected to the callback URL with the code as a query parameter. I can use this to get tokens. How do I integrate this in postman so that I can use the token for my upcoming request?

Best Answer

I have an example of doing this...enter image description here

  1. The callback URL as defined in the Cognito User Pool console under App Integration / App client settings.
  2. The URL for the login endpoint of your domain. This will be under Cognito User Pool / App Integration / Domain Name
  3. Client ID is found under Cognito User Pool / General Settings / App clients
  4. List the scopes you want to include in the Access Token. These must be enabled under Cognito User Pool / App Integration / App client settings. These can be either standard or custom scopes. Custom scopes are defined under App Integration / Resource servers and must include the resource server ID (e.g. https://myresource.com/myscope)
  5. Click Request Token enter image description here

You may now log in to your Cognito User Pool and receive an Access Token! The problem is that once you have the Access Token it isn't usable within Postman because Cognito expects it to be bare and Postman automatically prepends 'Bearer' to the token:enter image description here The token can be used in cURL though: curl -i -H "Authorization: dyJraWQiOiI1YVcwTUlqN1hBaHg4Yzh4Q3JNT2RsQjhZWjlCR3NQOE9BbkFlVFJtUklRPSIsImFsZyI6IlJTMjU2In0.eyJzdWIiOiI3YmEwZmMzOC01ZDcwkYS05MTI5ZTBmYTUzNTEiLCJ0b2tlbl91c2UiOiJhY2Nlc3MiLCJzY29wZSI6Imh0dHBzOlwvXC9hcGkubXk5MC5jb21cL3BvbGljZURlcGFydG1lbnRzLnJlYWQiLCJhdXRoX3RpbWUiOjE1NDA1OTIzMTYsImlzcyI6Imh0dHBzOlwvXC9jb2duaXRvLWlkcC51cy1lYXN0LTEuYW1hem9uYXdzLmNvbVwvdXMtZWFzdC0xX2xIbGo4NXpRYSIsImV4cCI6MTU0MDU5NTkxNiwiaWF0IjoxNTQwNTkyMzE2LCJ2ZXJzaW9uIjoyLCJqdGkiOiJhN2JiOWU2MC1kNmY1LTQ3ODYtODMwYi0xODdkZDZmYTZlODAiLCJjbGllbnRfaWQiOiI2MzhlYmZ1dTdiZDRkMXVkYnRzY2pxcnJncyIsInVzZXJuYW1lIjoicm9qbyJ9.O_GAxfFX3IQfLUu5Hxr05Wrk_2QDwNSL8tvDdEU0Dzs9d1XhQPafT6ney6yiGnKPOwsO8HhWdbT1QdDmByjuwQAURf1Da4Au7c-yhfgJcqWuHWZ4mledTSP8ukXqihMb4PoaDdU4JXyOdMLa50dBXVMgJNyXTpIulWOxFhiTW6DeQbnxNDk94cGNz_CTKCEqKStiloFZfLR7ndSrWqdOQ_SU__YV0RyKXZyK5yguv3nkUcI6cuKpbPVIZ5DNdpufbrtOLuZcC6HePBKrbTKjSZCt5-swy3YrwnY4ApTX7QUFzof6FylWaLA_KVP3Zv6ksSJ_IjBMFH1NRVHh4lbsOA" \ https://xxxxx.execute-api.us-east-1.amazonaws.com/v1/myresource/1234

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