public void setMFA(String mFA) {
        this.mFA = mFA;
    }
<p>
The concatenation of the authentication device's serial number, a space, and the value that is displayed on your
authentication device.
</p>

@param mFA
       The concatenation of the authentication device's serial number, a space, and the value that is displayed
       on your authentication device.
aws-java-sdk-s3control/src/main/java/com/amazonaws/services/s3control/model/PutBucketVersioningRequest.java