Script used for the issue EZP-21149

func.php

function testEzp21149()
{
    $contentTypeService = $this->repo->getContentTypeService();

    $newClass = $contentTypeService->newContentTypeCreateStruct( 'single_user' );
    $newClass->mainLanguageCode = "eng-GB";
//    $newClass->names = array( "eng-GB" => "Single User" );

    $defUserOne = $contentTypeService->newFieldDefinitionCreateStruct( 'user_one' , "ezuser" );
    $defUserOne->names = array( "eng-GB" => "User One" );
    $defUserOne->position = 1;

    $newClass->addFieldDefinition( $defUserOne );
    $newClass->addFieldDefinition( $defUserTwo );

    $contentTypeService->createContentType(
        $newClass,
        array( $contentTypeService->loadContentTypeGroupByIdentifier( 'Content' ) )
    );
}