Aws Request Pre Signer
fun AwsRequestPreSigner(scope: AwsCredentialScope, credentials: AwsCredentials, clock: Clock = Clock.systemUTC(), payloadMode: Payload.Mode = Payload.Mode.Unsigned): AwsPreRequestSigner(source)
fun AwsRequestPreSigner(scope: AwsCredentialScope, credentialsProvider: () -> AwsCredentials, clock: Clock = Clock.systemUTC(), payloadMode: Payload.Mode = Payload.Mode.Unsigned): AwsPreRequestSigner(source)