'notice' ? new NoticeMessage(length, messageValue) : new DatabaseError(messageValue, length, name) - visual-studio-code

Question

i am getting an error like this
C:\Users\gulct\Desktop\mappix\MapPix-Backend-V0.0.1 Beta\node_modules\pg-protocol\src\parser.ts:369
name === 'notice' ? new NoticeMessage(length, messageValue) : new DatabaseError(messageValue, length, name)
^
error: client selected an invalid SASL authentication mechanism
at Parser.parseErrorMessage (C:\Users\gulct\Desktop\mappix\MapPix-Backend-V0.0.1 Beta\node_modules\pg-protocol\src\parser.ts:369:69)
at Parser.handlePacket (C:\Users\gulct\Desktop\mappix\MapPix-Backend-V0.0.1 Beta\node_modules\pg-protocol\src\parser.ts:188:21)
at Parser.parse (C:\Users\gulct\Desktop\mappix\MapPix-Backend-V0.0.1 Beta\node_modules\pg-protocol\src\parser.ts:103:30)
at Socket.<anonymous> (C:\Users\gulct\Desktop\mappix\MapPix-Backend-V0.0.1 Beta\node_modules\pg-protocol\src\index.ts:7:48)
at Socket.emit (node:events:527:28)
at Socket.emit (node:domain:475:12)
at addChunk (node:internal/streams/readable:315:12)
at readableAddChunk (node:internal/streams/readable:289:9)
at Socket.Readable.push (node:internal/streams/readable:228:10)
at TCP.onStreamRead (node:internal/stream_base_commons:190:23)
[nodemon] app crashed - waiting for file changes before starting...
the file giving the error
let fieldType = this.reader.string(1)
while (fieldType !== '\0') {
fields[fieldType] = this.reader.cstring()
fieldType = this.reader.string(1)
}
const messageValue = fields.M
const message =
name === 'notice' ? new NoticeMessage(length, messageValue) : new DatabaseError(messageValue, length, name)
message.severity = fields.S
message.code = fields.C
message.detail = fields.D
message.hint = fields.H
message.position = fields.P
message.internalPosition = fields.p
message.internalQuery = fields.q
message.where = fields.W
I will be glad if you can solve this.
I couldn't do anything because I didn't know anything about it. I pressed ctrl + c, then I entered the npm install command and when I wrote the npm run dev code, it gave this error.