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我正在一步步按照教程进行操作，当我到达 run 部分时npx mikro-orm migration:create，出现此错误

TypeError [ERR_INVALID_ARG_TYPE]: The "key" argument must be of type string or an instance of Buffer, TypedArray, DataView, or KeyObject. Received null

    at prepareSecretKey (internal/crypto/keys.js:322:11)
    at new Hmac (internal/crypto/hash.js:113:9)
    at Object.createHmac (crypto.js:147:10)
    at createHMAC (C:\lireddit-server\node_modules\pg\lib\sasl.js:133:17)
    at Hi (C:\lireddit-server\node_modules\pg\lib\sasl.js:137:13)
    at Object.continueSession (C:\lireddit-server\node_modules\pg\lib\sasl.js:32:24)
    at Client._handleAuthSASLContinue (C:\lireddit-server\node_modules\pg\lib\client.js:248:10)
    at Connection.emit (events.js:314:20)
    at Connection.EventEmitter.emit (domain.js:483:12)
    at C:\lireddit-server\node_modules\pg\lib\connection.js:109:12
    at Parser.parse (C:\lireddit-server\node_modules\pg-protocol\src\parser.ts:102:9)
    at Socket.<anonymous> (C:\lireddit-server\node_modules\pg-protocol\src\index.ts:7:48)
    at Socket.emit (events.js:314:20)
    at Socket.EventEmitter.emit (domain.js:483:12)
    at addChunk (_stream_readable.js:298:12)
    at readableAddChunk (_stream_readable.js:273:9)```

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