class Doorkeeper::OAuth::PasswordAccessTokenRequest

def create_access_token
  @access_token = Doorkeeper::AccessToken.create!({
    :application_id     => client.id,
    :resource_owner_id  => resource_owner.id,
    :scopes             => scopes.to_s,
    :expires_in         => configuration.access_token_expires_in,
    :use_refresh_token  => refresh_token_enabled?
  })
end