For create_topic: If successful, a character string containing an SNS Topic ARN. Otherwise, a data structure of class “aws_error” containing any error message(s) from AWS and information about the request attempt.
For delete_topic: If successful, a logical TRUE. Otherwise, a data structure of class “aws_error” containing any error message(s) from AWS and information about the request attempt.
For list_topics: If successful, a data frame. Otherwise, a data structure of class “aws_error” containing any error message(s) from AWS and information about the request attempt.