text: module.exports = function getAuthors(sites, callback) {
  	let names = new Set();
  	for(let key in sites) {
  		let site = sites[key];
  		if(site.disabled) {
  			continue;
  		}
  
  		let authorsNames = new Set();
  		if(site.opened_by) {
  			authorsNames.add(site.opened_by);
  		}
  
  		if(Array.isArray(site.authors)) {
  			for(let name of site.authors) {
  				if(name) {
  					authorsNames.add(name);
  				}
  			}
  		}
  
  		for(let name of authorsNames) {
  			if(name) {
  				names.add(name);
  				if(callback && typeof callback === "function") {
  					callback(name, site);
  				}
  			}
  		}
  	}
  	return Array.from(names);
  }
  