Error when trying to npm link join-monster

gistfile1.txt

{ Error: Must be input type
    at invariant (/Users/gardner/src/demo/join-monster/node_modules/graphql/jsutils/invariant.js:19:11)
    at valueFromAST (/Users/gardner/src/demo/join-monster/node_modules/graphql/utilities/valueFromAST.js:156:125)
    at getArgumentValues (/Users/gardner/src/demo/join-monster/node_modules/graphql/execution/values.js:144:57)
    at Object.populateASTNode (/Users/gardner/src/demo/join-monster/dist/query-ast-to-sql-ast/index.js:100:21)
    at Object.queryASTToSqlAST (/Users/gardner/src/demo/join-monster/dist/query-ast-to-sql-ast/index.js:60:19)
    at /Users/gardner/src/demo/join-monster/dist/index.js:9:29
    at next (native)
    at step (/Users/gardner/src/demo/join-monster/dist/index.js:103:183)
    at /Users/gardner/src/demo/join-monster/dist/index.js:103:437
    at /Users/gardner/src/demo/join-monster/dist/index.js:103:99
    at joinMonster (/Users/gardner/src/demo/join-monster/dist/index.js:37:17)
    at resolve (/Users/gardner/src/demo/join-monster-demo/schema-paginated/QueryRoot.js:41:16)
    at resolveOrError (/Users/gardner/src/demo/join-monster-demo/node_modules/graphql/execution/execute.js:474:12)
    at resolveField (/Users/gardner/src/demo/join-monster-demo/node_modules/graphql/execution/execute.js:460:16)
    at /Users/gardner/src/demo/join-monster-demo/node_modules/graphql/execution/execute.js:275:18
    at Array.reduce (native)
  message: 'Must be input type',
  locations: [ { line: 16, column: 3 } ],
  path: [ 'user' ] }

just ran into the same issue, just wondering if you have solved this meanwhile?