The .aws/credentials file is commonly used by AWS CLI and other AWS tools to store access keys for AWS accounts. Here is a general format of what the content of such a file might look like:
[default] aws_access_key_id = YOUR_ACCESS_KEY_ID aws_secret_access_key = YOUR_SECRET_ACCESS_KEY callback-url-file-3A-2F-2F-2Fhome-2F-2A-2F.aws-2Fcredentials
[profile1] aws_access_key_id = YOUR_ACCESS_KEY_ID_1 aws_secret_access_key = YOUR_SECRET_ACCESS_KEY_1 callback-url-file-3A-2F-2F-2Fhome-2F-2A-2F.aws-2Fcredentials
Decoded URL: callback-url-file:////home//*/.aws/credentials callback-url-file-3A-2F-2F-2Fhome-2F-2A-2F.aws-2Fcredentials