We need a more secure way to save

[renat-sabitov]

As for now the only way to save credentials I know is to export AWS env variables and run credulous save
The problem here is that export commands stay in bash history and can be easily recovered.

Expected: when there is no AWS credentials available in environment, credulous save will expect them in the standard input, in the form provided by AWS. For example:

$ credulous save
No AWS credentials found in env, please enter them now:
Access Key ID: AKIAJ43JGF5FHJMXPKTQ
Secret Access Key: gQ00RQOHIwXK+Xb+cBfvSYSDLw+ioc3KeIOPYGw
Enter passphrase: *******
Successfully saved to user@account

[gregwebs]

use a space at the beginning of the line so that they won't be in the history