Aws
fun AwsRequestPreSigner(scope: AwsCredentialScope, credentials: AwsCredentials, clock: Clock = Clock.systemUTC()): AwsPreRequestSigner(source)
fun AwsRequestPreSigner(scope: AwsCredentialScope, credentialsProvider: () -> AwsCredentials, clock: Clock = Clock.systemUTC()): AwsPreRequestSigner(source)