Have a problem to read from MongoDB when job falls into following error

"internalMessage" : "com.mongodb.MongoCommandException: Command failed with error 13 (Unauthorized): 'not authorized on admin to execute command { aggregate: 1, pipeline: [ { $changeStream: { allChangesForCluster: true } } ], cursor: {}, $db: \"admin\", lsid: { id: UUID(\"695122a1-5087-4980-9f0e-c749d0761088\") }

Authentication Source: obs-inventory

Database Name: obs-inventory

Why error indicates

$db: \"admin\

and what work around would be?

New message text here