class Doorkeeper::OAuth::ClientCredentialsRequest::Issuer

def create(client, scopes, creator = Creator.new)
  if validation.valid?
    @token = create_token(client, scopes, creator)
    @error = :server_error unless @token
  else
    @token = false
    @error = validation.error
  end
  @token
end

def create_token(client, scopes, creator)
  context = Authorization::Token.build_context(
    client,
    Doorkeeper::OAuth::CLIENT_CREDENTIALS,
    scopes
  )
  ttl = Authorization::Token.access_token_expires_in(@server, context)
  creator.call(
    client,
    scopes,
    use_refresh_token: false,
    expires_in: ttl
  )
end

def initialize(server, validation)
  @server = server
  @validation = validation
end