In order to get that sign up to the account using Amazon AWS Portal Developer link. Once you signup you would get a email with various links to access your account. This is the general account front page you would get after you sign in.
On this page, you would get the link for Security Credentials. Under Security Credentials, you would get the ‘Access Keys’ and all the important fields corresponding to your developer account.
And you are now ready with your access keys.