code: public AdminInitiateAuthRequest withClientMetadata(java.util.Map<String, String> clientMetadata) {
          setClientMetadata(clientMetadata);
          return this;
      }
docs: <p>
  This is a random key-value pair map which can contain any key and will be passed to your PreAuthentication Lambda
  trigger as-is. It can be used to implement additional validations around authentication.
  </p>
  
  @param clientMetadata
  This is a random key-value pair map which can contain any key and will be passed to your PreAuthentication
  Lambda trigger as-is. It can be used to implement additional validations around authentication.
  @return Returns a reference to this object so that method calls can be chained together.