In AWS, how do I use my Access Key ID and Secret Access Key?
I can't use them in IAM users sign-in link.
AWS access key ID is a form of unique user/account identifier. AWS secret key is like private key. When AWS CLI sends a API request, the payload is signed by generating an HMAC with the secret key as the key.
Access Key ID and Secret Access Key are for API/CLI/SDK access. For IAM sign-in (dashboard) you need the username and password. When a new IAM user is added, the user gets username, password, access key and secret key, and the IAM URL from the IAM admin.
To complement helloV's answer : you can also use the access key and secret key to generate a signed URL to the console. This signed URL will allow to access the console, without being prompted for username and password.
Many AWS customers are using this technique to provide single-sign on for Federated users.
More details are available at : http://docs.aws.amazon.com/STS/latest/UsingSTS/STSMgmtConsole-manualURL.html
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