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Hope you have checked: https://druid.apache.org/docs/latest/development/extensions-core/druid-basic-security/#configuration

i have tried this but getting this error on adding username and password HTTP ERROR 500 org.apache.druid.java.util.common.IAE: No userMap is available for authenticator with prefix:[MyBasicMetadataAuthenticator]

Also there is a imply link where steps has been given: https://support.imply.io/hc/en-us/articles/360051794093-How-to-Enable-Basic-Auth-in-Druid

okay i'll try it once

Sure let us know the changes done, if you face issue after following the KB article.

Also you can refer below for basic auth , you can modify password/users as per your env https://gist.github.com/davidagee/c0c839cd23f047b838e8a3ea73320346

Thanks it helped