code: public byte[] getRecipientInitialsImage(String accountId, String envelopeId, String recipientId) throws ApiException {
      return getRecipientInitialsImage(accountId, envelopeId, recipientId, null);
    }
docs: Gets the initials image for a user.
  Retrieves the initials image for the specified user. The image is returned in the same format as it was uploaded. In the request you can specify if the chrome (the added line and identifier around the initial image) is returned with the image.  The userId specified in the endpoint must match the authenticated user&#39;s user id and the user must be a member of the account.  The &#x60;signatureIdOrName&#x60; paramter accepts signature ID or signature name. DocuSign recommends you use signature ID (&#x60;signatureId&#x60;), since some names contain characters that do not properly URL encode. If you use the user name, it is likely that the name includes spaces and you might need to URL encode the name before using it in the endpoint.   For example: \&quot;Bob Smith\&quot; to \&quot;Bob%20Smith\&quot;  Older envelopes might only contain chromed images. If getting the non-chromed image fails, try getting the chromed image.
  @param accountId The external account number (int) or account ID Guid. (required)
  @param envelopeId The envelopeId Guid of the envelope being accessed. (required)
  @param recipientId The ID of the recipient being accessed. (required)
  @return byte[]