This error message is indicating that there was a problem with the authentication credentials provided when attempting to connect to a MongoDB server. This could mean that the username or password provided is incorrect, or that the user does not have the correct permissions to access the database.

It's important to check the credentials and ensure that the user has the proper access to the database.

Additionally, check the version of MongoDB. Verify that your mongo version is compatible with your driver version.

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Happy Coding!