Difficulty Querying Events with the after Parameter in Stargaze(constellation) GraphQL API

[prince-hope1975]

I am attempting to use the Stargaze GraphQL API to query events for specific contract addresses using the events query. While I can successfully query events using the forContractAddrs parameter, I encounter difficulties when trying to utilize the $after variable to paginate through results.

query EventsFor(
  $forContractAddrs: [String!],
  $after: String,
) {
  events(
    forContractAddrs: $forContractAddrs,
    sortBy: BLOCK_HEIGHT_ASC
    after: $after
  ) {
    edges {
      node {
        createdAt
        eventName
        action
        data
        action
        id
      }
    }
  }
}

I'd like to understand what type of data goes in the after variable. I have tried using the standard timestamp format returned by the constellation API, but that doesn't seem to work