Add optional password field on usercreation

src/js/client.js

@@ -1745,6 +1745,7 @@ angular.module('Application').service('Client', ['$http', '$interval', '$timeout
         };
 
         if (user.username !== null) data.username = user.username;
+        if (user.password !== null) data.password = user.password;
 
         post('/api/v1/users', data, null, function (error, data, status) {
             if (error) return callback(error);