refresh token API error "secretOrPrivateKey must have a value" - node.js

Question

When a user logs into the API generates a token so that he has access to other endpoints, but the token expires in 60sec, I made a function to generate a new valid token using the old token (which was stored in the database), but when I'm going to generate a new valid token I'm getting the secretOrPrivateKey must have a value error
The function refreshToken use function login to generate a new token
Nest error:
secretOrPrivateKey must have a value
Error: secretOrPrivateKey must have a value
at Object.module.exports [as sign] (C:\Users\talis\nova api\myflakes_api\node_modules\jsonwebtoken\sign.js:107:20)
at JwtService.sign (C:\Users\talis\nova api\myflakes_api\node_modules\#nestjs\jwt\dist\jwt.service.js:28:20)
at AuthService.login (C:\Users\talis\nova api\myflakes_api\src\auth\auth.service.ts:18:39)
at TokenService.refreshToken (C:\Users\talis\nova api\myflakes_api\src\token\token.service.ts:39:37)
at processTicksAndRejections (node:internal/process/task_queues:96:5)
at TokenController.refreshToken (C:\Users\talis\nova api\myflakes_api\src\token\token.controller.ts:12:16)
at C:\Users\talis\nova api\myflakes_api\node_modules\#nestjs\core\router\router-execution-context.js:46:28
at C:\Users\talis\nova api\myflakes_api\node_modules\#nestjs\core\router\router-proxy.js:9:17
My code:
Function refreshToken in the file token.service.ts
async refreshToken(oldToken: string) {
let objToken = await this.tokenRepository.findOne({hash: oldToken})
if (objToken) {
let user = await this.userService.findOneOrFail({email:objToken.email})
return this.authService.login(user)
} else {
return new UnauthorizedException(MessagesHelper.TOKEN_INVALID)
}
}
Function login in the file auth.service.ts
async login(user: UsersEntity) {
const payload = { email: user.email, sub: user.idUser }
const token = this.jwtService.sign(payload) // here!!!
this.tokenService.save(token, user.email)
return {
token: token
};
}
Error is on const token = this.jwtService.sign(payload)
Here is the file jwt.strategy.ts
import { Injectable } from "#nestjs/common";
import { PassportStrategy } from "#nestjs/passport";
import { ExtractJwt, Strategy } from "passport-jwt";
import { jwtConstants } from "../constants";
#Injectable()
export class JwtStrategy extends PassportStrategy(Strategy) {
constructor() {
super({
jwtFromRequest: ExtractJwt.fromAuthHeaderAsBearerToken(),
ignoreExpiration: false,
secretOrKey: jwtConstants.secret,
});
}
async validate(payload: { sub: any; email: any; }) {
return { id: payload.sub, email: payload.email}
}
}
And here local.strategy.ts
import { Injectable, UnauthorizedException } from "#nestjs/common";
import { PassportStrategy } from "#nestjs/passport";
import { Strategy } from "passport-local";
import { MessagesHelper } from "src/helpers/messages.helper";
import { AuthService } from "../auth.service";
#Injectable()
export class LocalStrategy extends PassportStrategy(Strategy) {
constructor(private authService: AuthService) {
super({ usernameField: 'email' });
}
async validate(email: string, password: string): Promise<any> {
const user = await this.authService.validateUser(email, password);
if(!user)
throw new UnauthorizedException(MessagesHelper.PASSWORD_OR_EMAIL_INVALID)
return user;
}
}
this is the AuthModule where is JwtModule.register
#Module({
imports: [
ConfigModule.forRoot(),
UsersModule,
PassportModule,
TokenModule,
JwtModule.register({
secret: jwtConstants.secret,
signOptions: { expiresIn: '60s' },
}),
],
controllers: [AuthController],
providers: [AuthService, LocalStrategy, JwtStrategy],
exports: [JwtModule, AuthService]
})
export class AuthModule {}
Guys i tried to use images, but i'm new user and i still don't have a reputation, sorry.

Answer 1

Doing what #Micael Levi mentioned in the comments worked for me, so it would be:
const token = this.jwtService.sign(payload, jwtConstants.secret)
For future reference, I encountered this issue despite my environment variables being defined (process.env.SECRET_KEY being undefined was a common problem seen in other similar questions). So what I did to fix mine was:
return {
access_token: this.jwtService.sign(payload, { secret: process.env.JWT_SEC }),
};