SigNoz is an open-source APM. It helps developers monitor their applications & troubleshoot problems, an open-source alternative to DataDog, NewRelic, etc.

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sometimes I can see my metrics (no data). I saw the error in the query builder
`API responded with 400 - encountered multiple errors: error in query-A: code: 516, message: signoz: Authentication failed: password is incorrect or there is no user with such name`

Please create an issue here <https://github.com/SigNoz/signoz>. It’s a UI bug with query builder.