Mahara: Site unavailable

Mahara could not connect to the application database.

* If you are using Mahara, please wait a minute and try again
* If you are the administrator, please check your database settings and make sure your database is available

The error received was:
mysqli error: [1045: Access denied for user 'mahara_user'@'10.0.100.111' (using password: YES)] in CONNECT(10.0.100.30, 'mahara_user', '****', mahara)