public com.google.protobuf.ByteString getUsernameBytes() {
      java.lang.Object ref = username_;
      if (ref instanceof String) {
        com.google.protobuf.ByteString b =
            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
        username_ = b;
        return b;
      } else {
        return (com.google.protobuf.ByteString) ref;
      }
    }
<pre>
Initial username.
</pre>

<code>string username = 1;</code>

@return The bytes for username.
java-vmwareengine/proto-google-cloud-vmwareengine-v1/src/main/java/com/google/cloud/vmwareengine/v1/Credentials.java