Kibana is generating failure logs like the following:
[2025-03-25T15:49:06.652+01:00][INFO ][plugins.security.authentication] Authentication attempt failed: {"error":{"root_cause":[{"type":"security_exception","reason":"unable to authenticate user [elastic] for REST request [/_security/_authenticate]","header":{"WWW-Authenticate":["Basic realm=\"security\" charset=\"UTF-8\"","Bearer realm=\"security\"","ApiKey"]}}],"type":"security_exception","reason":"unable to authenticate user [elastic] for REST request [/_security/_authenticate]","header":{"WWW-Authenticate":["Basic realm=\"security\" charset=\"UTF-8\"","Bearer realm=\"security\"","ApiKey"]}},"status":401}
I cannot find an 'elastic' user defined anywhere in the Kibana configuration.
Can anyone point me in the direction of the configuration for [plugins.security.authentication] ?