Graphql API for Topics

Hello, 

I’m trying to add the topic using graphql and it’s not working. Can you please help me with the correct syntax. Following is the sample mutation request I’m sending. 

mutation{
acceptTopicSuggestion(input:{
name: "testing-topics",
repositoryId: "Repo-id-here"
} )
{
topic{
node{
id,
name,
relatedTopics
viewerHasStarred
}
}
}
}