UnrecognizedClientException error when changing Access & secret key

[euniceek]

After changing the Access & secret key on Athena data source configuration, I am seeing UnrecognizedClientException error. It seems like access key ID and secret access key are cached at a datasource level in athena plugin (v2.2.0): https://github.com/mtanda/grafana-aws-athena-datasource/blob/2.2.0/credentials.go#L24-L223

Here is full error message:

error querying the database: error executing query: UnrecognizedClientException: The security token included in the request is invalid. status code: 400

Steps to reproduce

• Create an Athena data source. The authentication provider choose an access & secret key and input the access key ID and secret access key.
• Use Explore to query in Athena.
• Create a new IAM user and obtain an Access Key ID and Secret Access Key.
• Delete the IAM user that used as the data source in step 1.
• Change the Access Key ID and Secret Access Key of data source to those obtained in step 3 and save them.
• Use Explore to query in Athena, then I get the same error as the customer.
• The error continues for while, then resolves without any action.