Change the default user and its Password

Hi All, I have to change the default user credential of BaseX where should i made the changes, when i access the url "http://localhost:8984/dba" now it opens with the default credentials which is "admin" now i have to change it, i have made the changes in the web.xml

<context-param>
    <param-name>org.basex.user</param-name>
    <param-value>dharmendra</param-value>
  </context-param>

but it is not working still it is taking the default credentials. Regards Dharmendra Kumar Singh