S3 and SES using instance profile as credentials provider

I am trying to the configure the Amazon S3 and SES to use the instance profile as credentials provider.

Not the env or ini provider.

https://docs.aws.amazon.com/aws-sdk-php/v3/guide/guide/credentials.html#credential-provider

From the server if i do: curl http://169.254.169.254/latest/meta-data/iam/security-credentials/..blah..

i get the successful response. { "Code" : "Success", "LastUpdated" : "2017-01-27T10:55:35Z", "Type" : "AWS-HMAC", "AccessKeyId" : "....the key...", "SecretAccessKey" : "....the secret....", "Token" : "...the token...", "Expiration" : "2017-01-27T17:02:33Z" }

I thought that by not configuring the .env and ini, then it would automatically attempt the GET request for the instance profile.

I currently just get an error: ClientResolver.php line 350: Missing required client configuration options

Any ideas?