customer can specify the mongosql_auth plugin directory in the ODBC connector

Hi team,

In our BIC mongosql_auth documentation, it didn't mention that you can specify the mongosql_auth plugin directory in ODBC connector, some customer may find a hard time to get the plugin work due to that. We might consider adding that to our tutorial.

here's a screenshot for you to reference:

https://cl.ly/2U1v2e0v0c2S