JWT Token Should bo Compatible with Jhipster (Java Version)

[pietromarrone]

Describe the bug
In a microservices architecture it is possible that some services are written in Java (JHipster) while others in NodeJs (NHipster), it would be advisable to have a compatible JWT Token.
At the moment this does not happen, the token expected by NHipster is with HS256 encoding, even by changing this encoding to the token is not compatible as it differs in the authorities attribute name.

To Reproduce
Steps to reproduce the behavior:

1. Create Gateway with Jhipster Blueprint
2. Create Microservice Application using NHipster blue print
3. Authenticate with Gateway
4. Use Generated JWT calling (Microservice Application using NHipster) protected api

Expected behavior
Authentication/Authorizazion success

Screenshots

• JWT by NHipster
  
• JWT Token by JHipster
  

Desktop (please complete the following information):

• OS: Indepentent
• Browser Indepentent
• Version NHipster 2.0.0

NHipster configuration

• Version NHipster 2.0.0

Thanks for the issue! It is a feature that it would be great to implement. If you want to contribute, is simple.

• Try to specify algorithm property in signOptions (after expiresIn) for authModule as:

 signOptions: {
            expiresIn: '3h',
            algorithm: 'HS512'
 }

• You can change the payload interface, changing username in sub, and authorities array in an auth string.
  Please attention because you have to change also the AuthService . So do some trials in your microservice, maybe replacing the authorities array in string could affect the authorization pattern.

You can do these changes on your microservice and after adding to the templates.

Thanks in advance