Error: Invalid arguments: 2 expected, but 1 supplied.
    at cb (/Users/dlombard/Documents/development/work_projects/node_realm_test/node_modules/realm/lib/app.js:29:37)
    at Promise (/Users/dlombard/Documents/development/work_projects/node_realm_test/node_modules/realm/lib/utils.js:33:13)
    at new Promise (<anonymous>)
    at promisify (/Users/dlombard/Documents/development/work_projects/node_realm_test/node_modules/realm/lib/utils.js:32:16)
    at App.removeUser (/Users/dlombard/Documents/development/work_projects/node_realm_test/node_modules/realm/lib/app.js:29:16)
    at run (/Users/dlombard/Documents/development/work_projects/node_realm_test/index.js:18:15)
    at process._tickCallback (internal/process/next_tick.js:68:7)
    at Function.Module.runMain (internal/modules/cjs/loader.js:834:11)
    at startup (internal/bootstrap/node.js:283:19)
    at bootstrapNodeJSCore (internal/bootstrap/node.js:623:3)