Start root access to mysql database

mysql -uroot -p

Check if sonar database exists.

show databases;

use sonar;

Reset admin user to admin password.

update users set crypted_password = '88c991e39bb88b94178123a849606905ebf440f5', salt='6522f3c5007ae910ad690bb1bdbf264a34884c6d' where login = 'admin';