This guide will walk you through how to fix the error:
"Please login with a data source user that has access to at least one account."
To fix this error, please check that you meet the data source access requirements, meaning the user role level assigned to the account(s) you are fetching data from. Please refer to this guide: General Data Source Access Requirements.
Please note that if you don't meet those requirements, you won't be able to authenticate the data source. If you are unable to change your access/permission-level, please contact the administrator of your account(s).
Re-authenticate the data source
When you have confirmed the above permissions, please re-authenticate the data source:
Supermetrics for Data Studio: How to re-authenticate a Data Studio connector
Supermetrics for Google Sheets: How to re-authenticate a Google Sheets connector
Supermetrics for Microsoft Excel: How to re-authenticate an Excel connector
Supermetrics for API: How to re-authenticate an API connector
Supermetrics for BigQuery: How to re-authenticate a BigQuery connector
Supermetrics for Datawarehouse and Cloud Storage: How to re-authenticate a Data Warehouse and Cloud Storage connector
Please verify that you have been correctly assigned as a user to your license. Please also check that the data source is supported by your license package. To view and manage your license(s), please refer to this guide: License Management
If everything fails
Renewing a login (tokens)
In some cases, you might need to renew the login from the data source associated with the error message. To do so, please refer to this guide: How to Renew Tokens - Login Management in Team Site
If you continue to have issues after trying the above actions, please submit a request to support with the details of the issue and we will assist you.