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Error querying items: Error executing "Query" on "https://dynamodb.ap-south-1.amazonaws.com"; AWS HTTP error: Client error: `POST https://dynamodb.ap-south-1.amazonaws.com` resulted in a `400 Bad Request` response: {"__type":"com.amazon.coral.validate#ValidationException","message":"One or more parameter values are not valid. The Att (truncated...) ValidationException (client): One or more parameter values are not valid. The AttributeValue for a key attribute cannot contain an empty string value. Key: User_id - {"__type":"com.amazon.coral.validate#ValidationException","message":"One or more parameter values are not valid. The AttributeValue for a key attribute cannot contain an empty string value. Key: User_id"}