NestJS JwtService throws Error: secretOrPrivateKey must have a value (not due to env variables)

Question

I need to use jwt in my project, so decided to go with: "@nestjs/jwt": "^10.2.0"

In my shared module I am configuring the secret keys and have also ensured that the values are defined by logging them.

Below is the code for my user.service.ts where I am using my jwtService to sign the mobileNumber. Removed all mobileNumber verification steps for now just trying to debug jwtService.

I noticed that if I pass secret key to the sign function myself in jwt options, then it works fine. But then what was the use of configuring it in shared module where I passed the secret key and expired in time.

Also reading another answers on the internet I found that it is probably due to me adding JwtService in the providers array which probably creates a new instance of the JwtService,

but if I don't do that I get this error:

Error: Nest can't resolve dependencies of the UserService (UserRepository, ?). Please make sure that the argument JwtService at index [1] is available in the UserModule context.

Potential solutions:
- Is UserModule a valid NestJS module?
- If JwtService is a provider, is it part of the current UserModule?
- If JwtService is exported from a separate @Module, is that module imported within UserModule?
  @Module({
    imports: [ /* the Module containing JwtService */ ]
  })

async register(createUserDto: CreateUserDto) {
    const { mobileNumber } = createUserDto;
    return this.jwtService.sign(mobileNumber, {
      secret: 'testkajfkdf',
    });
  }

Please helppp

Answer 1

Remove the JwtService from the providers array of the UserModule, add the JwtModule to the exports of the SharedModule, and add the SharedModule to the imports of the UserModule