{
Client is not authorized to access this resource: ResourceName
}

request({
      url: this.url+endpoint,
      method: 'GET',
      headers:{
        'Authorization': 'Bearer '+bearer,
        'User-Agent': '...',
        'Accept' : 'application/json',
        'Content-Type': 'application/json'
      }
    }, (error, response, body) => {
      callback(error,response,body)
    })

})

request({
  url: this.url+'integration/admin/token',
  method: 'POST',
  json:{
    username: this.username,
    password: this.password
  }
}, (error, response, body) => {
    callback(body)
})

public function isAllowed($resource, $privilege = null)
{
    return $this->_aclPolicy->isAllowed($this->_aclRoleLocator->getAclRoleId(), $resource, $privilege);
}

return true

getAclRoleId()

namespace MagentoFrameworkAuthorizationRoleLocator;

class DefaultRoleLocator implements
MagentoFrameworkAuthorizationRoleLocatorInterface
{
/**
 * Retrieve current role
 *
 * @return string
 */
public function getAclRoleId()
{
    return '';

}
}