Generate a temporary credential for accessing S3
credentials_post_temporary(id, duration = NULL)
integer required. The ID of the credential.
integer optional. The number of seconds the temporary credential should be valid. Defaults to 15 minutes. Must not be less than 15 minutes or greater than 36 hours.
A list containing the following elements:
string, The identifier of the credential.
string, The secret part of the credential.
string, The session token identifier.