Error invalid username or password for user "default" in Alerts

[tmanh17]

What happened:

Get error invalid username or password for user "default"; although don't use default user in configuration.

What you expected to happen:

It works for all normal users.

How to reproduce it (as minimally and precisely as possible):

1. Install vertamedia-clickhouse-datasource plugin v2.3.1, by following ClickHouse plugin alert get 401 Unauthorized error #341 (comment)
2. create a dashboard and panel that use ClickHouse Datasource with basic authentication using an particular user except default user then create an alert for this.

3. click Test rule

Anything else we need to know?:

Don't get this error if we use default user

Environment:

• Grafana version: v7.4.2
• Plugin version: v2.3.1
• OS Grafana is installed on: Debian 8.5
• User OS & Browser: Ubuntu 20.04 & Chrome
• Others:

[Slach]

thanks a lot for reporting i will try to fix it ASAP