@java.lang.Override
      public final Builder mergeUnknownFields(
          final com.google.protobuf.UnknownFieldSet unknownFields) {
        return super.mergeUnknownFields(unknownFields);
      }
<pre>
Required. AWS secret access key. This field is not returned in RPC
responses.
</pre>

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

@param value The bytes for secretAccessKey to set.
@return This builder for chaining.
java-storage-transfer/proto-google-cloud-storage-transfer-v1/src/main/java/com/google/storagetransfer/v1/proto/TransferTypes.java