What does it mean to receive an AuthenticationException when trying to connect to Astra DB from a Spring Boot application?

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An AuthenticationException when trying to connect to Astra DB from a Spring Boot application means that the authentication credentials provided by the application are invalid or incorrect. This can occur when the username, password, or other authentication parameters provided by the application do not match the ones required by Astra DB. To resolve this issue, you should double-check the authentication details specified in your application's configuration files or environment variables, and ensure that they match the Astra DB authentication requirements.