몽구스 연결 에러

localhost:3000/api/docs 에서 /signup 테스트를하면 에러가 납니다. 강의를 수회 돌려봤는데 딱히 잘못 설정한건 없어보이는데 혹시 유추될만한게 있을까요?

-- vscode 터미널 에러 --

MongoDB connection error: { MongoNetworkError: failed to connect to server [cluster0-shard-00-00.wrnxu.mongodb.net:27017] on first connect [MongoNetworkError: connection 5 to cluster0-shard-00-00.wrnxu.mongodb.net:27017 timed out]

    at Pool.<anonymous> (/Users/may/dev/vue-scaffolding/vue-til-server/node_modules/mongodb-core/lib/topologies/server.js:564:11)

    at Pool.emit (events.js:198:13)

    at Connection.<anonymous> (/Users/may/dev/vue-scaffolding/vue-til-server/node_modules/mongodb-core/lib/connection/pool.js:317:12)

    at Object.onceWrapper (events.js:286:20)

    at Connection.emit (events.js:198:13)

    at TLSSocket.<anonymous> (/Users/may/dev/vue-scaffolding/vue-til-server/node_modules/mongodb-core/lib/connection/connection.js:257:10)

    at Object.onceWrapper (events.js:286:20)

    at TLSSocket.emit (events.js:198:13)

    at TLSSocket.Socket._onTimeout (net.js:442:8)

    at ontimeout (timers.js:436:11)

    at tryOnTimeout (timers.js:300:5)

    at listOnTimeout (timers.js:263:5)

    at Timer.processTimers (timers.js:223:10)

  name: 'MongoNetworkError',

  errorLabels: [ 'TransientTransactionError' ],

  [Symbol(mongoErrorContextSymbol)]: {} }