message: Default to null if there are no ssh keys.
diff: @@ -4,6 +4,7 @@ import R from 'ramda';
  import { makeExecutableSchema } from 'graphql-tools';
  const extractSshKeys = R.compose(
  + R.ifElse(R.isEmpty, () => null, (value) => value),
  R.map(([owner, value]) => ({ ...value, owner: owner })),
  Object.entries,
  R.propOr({}, 'ssh_keys'),
  