Cannot read property 'battleGroup' of undefined

TypeError: Cannot read property 'battleGroup' of undefined
    at router.get.userData (/home/owner/node/battleinf-stable/routes/user.js:82:70)
    at Layer.handle [as handle_request] (/home/owner/node/battleinf-stable/node_modules/express/lib/router/layer.js:82:5)
    at next (/home/owner/node/battleinf-stable/node_modules/express/lib/router/route.js:100:13)
    at Route.dispatch (/home/owner/node/battleinf-stable/node_modules/express/lib/router/route.js:81:3)
    at Layer.handle [as handle_request] (/home/owner/node/battleinf-stable/node_modules/express/lib/router/layer.js:82:5)
    at /home/owner/node/battleinf-stable/node_modules/express/lib/router/index.js:234:24
    at Function.proto.process_params (/home/owner/node/battleinf-stable/node_modules/express/lib/router/index.js:312:12)
    at /home/owner/node/battleinf-stable/node_modules/express/lib/router/index.js:228:12
    at Function.match_layer (/home/owner/node/battleinf-stable/node_modules/express/lib/router/index.js:295:3)
    at next (/home/owner/node/battleinf-stable/node_modules/express/lib/router/index.js:189:10)