authentication.js

const { AuthenticationService, JWTStrategy } = require('@feathersjs/authentication');
const { FeathersError } = require('@feathersjs/errors');
const { LocalStrategy } = require('@feathersjs/authentication-local');
const { expressOauth } = require('@feathersjs/authentication-oauth');

class ImATeaPot extends FeathersError {
  constructor(message, data) {
    super(message, 'i-m-a-tea-pot', 418, 'ImATeaPot', data);
  }
}

class MyLocalStrategy extends LocalStrategy {
  async findEntity(username, params) {
    const entity = await super.findEntity(username, params);

    if (entity.isCoffeeFan) {
      throw new ImATeaPot('User can only support tea.');
    }

    return entity;
  }
}

module.exports = app => {
  const authentication = new AuthenticationService(app);

  authentication.register('jwt', new JWTStrategy());
  authentication.register('local', new MyLocalStrategy());

  app.use('/authentication', authentication);
  app.configure(expressOauth());
};

combined-auth.js

const { AuthenticationService, JWTStrategy } = require('@feathersjs/authentication');
const { FeathersError } = require('@feathersjs/errors');
const { LocalStrategy } = require('@feathersjs/authentication-local');
const { expressOauth } = require('@feathersjs/authentication-oauth');

class ImATeaPot extends FeathersError {
  constructor(message, data) {
    super(message, 'i-m-a-tea-pot', 418, 'ImATeaPot', data);
  }
}

class MyLocalStrategy extends LocalStrategy {
  async getEntityQuery(query, params) {
    // Query for user but only include users marked as `active`
    return {
      ...query,
      active: true,
      $limit: 1
    }
  }

  async findEntity(username, params) {
    const entity = await super.findEntity(username, params);

    if (entity.isCoffeeFan) {
      throw new ImATeaPot('User can only support tea.');
    }

    return entity;
  }
}

module.exports = app => {
  const authentication = new AuthenticationService(app);

  authentication.register('jwt', new JWTStrategy());
  authentication.register('local', new MyLocalStrategy());

  app.use('/authentication', authentication);
  app.configure(expressOauth());
};

local-get-entity.js

const { AuthenticationService, JWTStrategy } = require('@feathersjs/authentication');
const { BadRequest } = require('@feathersjs/errors');
const { LocalStrategy } = require('@feathersjs/authentication-local');
const { expressOauth } = require('@feathersjs/authentication-oauth');

class MyLocalStrategy extends LocalStrategy {
  async getEntityQuery(query, params) {
    // Query for user but only include users marked as `active`
    return {
      ...query,
      active: true,
      $limit: 1
    }
  }
}

module.exports = app => {
  const authentication = new AuthenticationService(app);

  authentication.register('jwt', new JWTStrategy());
  authentication.register('local', new MyLocalStrategy());

  app.use('/authentication', authentication);
  app.configure(expressOauth());
};