SyntaxError: Unexpected token a in JSON at position 69

[ymys]

ym@home node-js-jwt-auth-mongodb % node server.js
Server is running on port 8080.
Successfully connect to MongoDB.
SyntaxError: Unexpected token a in JSON at position 69
at JSON.parse ()
at parse (/Users/ym/NonDropBox/projects/bezkoder/node-js-jwt-auth-mongodb/node_modules/body-parser/lib/types/json.js:89:19)
at /Users/ym/NonDropBox/projects/bezkoder/node-js-jwt-auth-mongodb/node_modules/body-parser/lib/read.js:121:18
at invokeCallback (/Users/ym/NonDropBox/projects/bezkoder/node-js-jwt-auth-mongodb/node_modules/raw-body/index.js:224:16)
at done (/Users/ym/NonDropBox/projects/bezkoder/node-js-jwt-auth-mongodb/node_modules/raw-body/index.js:213:7)
at IncomingMessage.onEnd (/Users/ym/NonDropBox/projects/bezkoder/node-js-jwt-auth-mongodb/node_modules/raw-body/index.js:273:7)
at IncomingMessage.emit (events.js:327:22)
at endReadableNT (internal/streams/readable.js:1327:12)
at processTicksAndRejections (internal/process/task_queues.js:80:21