public static Builder newBuilder(
        com.google.cloud.vmmigration.v1.AwsSourceDetails.AccessKeyCredentials prototype) {
      return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
    }
<pre>
Input only. AWS secret access key.
</pre>

<code>string secret_access_key = 2 [(.google.api.field_behavior) = INPUT_ONLY];</code>

@return The bytes for secretAccessKey.
java-vmmigration/proto-google-cloud-vmmigration-v1/src/main/java/com/google/cloud/vmmigration/v1/AwsSourceDetails.java