Savings Plans are a pricing model that offer significant savings on Amazon Web Services usage (for example, on Amazon EC2 instances). You commit to a consistent amount of usage per hour, in the specified currency, for a term of one or three years, and receive a lower price for that usage. For more information, see the Amazon Web Services Savings Plans User Guide.
credentials: Optional credentials shorthand for the config parameter
creds :
access_key_id : AWS access key ID
secret_access_key : AWS secret access key
session_token : AWS temporary session token
profile : The name of a profile to use. If not given, then the default profile is used.
anonymous : Set anonymous credentials.
endpoint: Optional shorthand for complete URL to use for the constructed client.
region: Optional shorthand for AWS Region used in instantiating the client.
Returns
A client for the service. You can call the service's operations using syntax like svc$operation(...), where svc is the name you've assigned to the client. The available operations are listed in the Operations section.