How to add Authentication in laradmin?
I have try this....but it throws an error..

First,
php artisan make:auth

then it throws this error
Unauthenticated.C:\xampp\htdocs\Laradmin-master\vendor\laravel\framework\src\Illuminate\Auth\GuardHelpers.php#39

Hi, I'm having trouble when running composer install. Please advice on the issue. Thank you so much.

symfony/var-dumper suggests installing ext-symfony_debug ()
maximebf/debugbar suggests installing kriswallsmith/assetic (The best way to man
age assets)
maximebf/debugbar suggests installing predis/predis (Redis storage)
symfony/translation suggests installing symfony/config ()
symfony/routing suggests installing doctrine/annotations (For using the annotati
on loader)
symfony/routing suggests installing symfony/config (For using the all-in-one rou
ter or any loader)
symfony/routing suggests installing symfony/dependency-injection (For loading ro
utes from a service)
symfony/routing suggests installing symfony/expression-language (For using expre
ssion matching)
symfony/event-dispatcher suggests installing symfony/dependency-injection ()
symfony/http-kernel suggests installing symfony/browser-kit ()
symfony/http-kernel suggests installing symfony/class-loader ()
symfony/http-kernel suggests installing symfony/config ()
symfony/http-kernel suggests installing symfony/dependency-injection ()
paragonie/random_compat suggests installing ext-libsodium (Provides a modern cry
pto API that can be used to generate random bytes.)
ramsey/uuid suggests installing ext-libsodium (Provides the PECL libsodium exten
sion for use with the SodiumRandomGenerator)
ramsey/uuid suggests installing ext-uuid (Provides the PECL UUID extension for u
se with the PeclUuidTimeGenerator and PeclUuidRandomGenerator)
ramsey/uuid suggests installing ircmaxell/random-lib (Provides RandomLib for use
with the RandomLibAdapter)
ramsey/uuid suggests installing moontoast/math (Provides support for converting
UUID to 128-bit integer (in string form).)
ramsey/uuid suggests installing ramsey/uuid-console (A console application for g
enerating UUIDs with ramsey/uuid)
ramsey/uuid suggests installing ramsey/uuid-doctrine (Allows the use of Ramsey\U
uid\Uuid as Doctrine field type.)
psy/psysh suggests installing ext-pcntl (Enabling the PCNTL extension makes PsyS
H a lot happier :))
psy/psysh suggests installing ext-pdo-sqlite (The doc command requires SQLite to
work.)
psy/psysh suggests installing ext-posix (If you have PCNTL, you'll want the POSI
X extension as well.)
psy/psysh suggests installing ext-readline (Enables support for arrow-key histor
y navigation, and showing and manipulating command history.)
monolog/monolog suggests installing aws/aws-sdk-php (Allow sending log messages
to AWS services like DynamoDB)
monolog/monolog suggests installing doctrine/couchdb (Allow sending log messages
to a CouchDB server)
monolog/monolog suggests installing ext-amqp (Allow sending log messages to an A
MQP server (1.0+ required))
monolog/monolog suggests installing ext-mongo (Allow sending log messages to a M
ongoDB server)
monolog/monolog suggests installing graylog2/gelf-php (Allow sending log message
s to a GrayLog2 server)
monolog/monolog suggests installing mongodb/mongodb (Allow sending log messages
to a MongoDB server via PHP Driver)
monolog/monolog suggests installing php-amqplib/php-amqplib (Allow sending log m
essages to an AMQP server using php-amqplib)
monolog/monolog suggests installing php-console/php-console (Allow sending log m
essages to Google Chrome)
monolog/monolog suggests installing rollbar/rollbar (Allow sending log messages
to Rollbar)
monolog/monolog suggests installing ruflin/elastica (Allow sending log messages
to an Elastic Search server)
league/flysystem suggests installing league/flysystem-aws-s3-v2 (Allows you to u
se S3 storage with AWS SDK v2)
league/flysystem suggests installing league/flysystem-aws-s3-v3 (Allows you to u
se S3 storage with AWS SDK v3)
league/flysystem suggests installing league/flysystem-azure (Allows you to use W
indows Azure Blob storage)
league/flysystem suggests installing league/flysystem-cached-adapter (Flysystem
adapter decorator for metadata caching)
league/flysystem suggests installing league/flysystem-copy (Allows you to use Co
py.com storage)
league/flysystem suggests installing league/flysystem-dropbox (Allows you to use
Dropbox storage)
league/flysystem suggests installing league/flysystem-eventable-filesystem (Allo
ws you to use EventableFilesystem)
league/flysystem suggests installing league/flysystem-rackspace (Allows you to u
se Rackspace Cloud Files)
league/flysystem suggests installing league/flysystem-sftp (Allows you to use SF
TP server storage via phpseclib)
league/flysystem suggests installing league/flysystem-webdav (Allows you to use
WebDAV storage)
league/flysystem suggests installing league/flysystem-ziparchive (Allows you to
use ZipArchive adapter)
laravel/framework suggests installing aws/aws-sdk-php (Required to use the SQS q
ueue driver and SES mail driver (~3.0).)
laravel/framework suggests installing doctrine/dbal (Required to rename columns
and drop SQLite columns (~2.4).)
laravel/framework suggests installing guzzlehttp/guzzle (Required to use the Mai
lgun and Mandrill mail drivers and the ping methods on schedules (~5.3|~6.0).)
laravel/framework suggests installing league/flysystem-aws-s3-v3 (Required to us
e the Flysystem S3 driver (~1.0).)
laravel/framework suggests installing league/flysystem-rackspace (Required to us
e the Flysystem Rackspace driver (~1.0).)
laravel/framework suggests installing pda/pheanstalk (Required to use the beanst
alk queue driver (~3.0).)
laravel/framework suggests installing predis/predis (Required to use the redis c
ache and queue drivers (~1.0).)
laravel/framework suggests installing pusher/pusher-php-server (Required to use
the Pusher broadcast driver (~2.0).)
laravel/framework suggests installing symfony/psr-http-message-bridge (Required
to use psr7 bridging features (0.2.).)
sebastian/global-state suggests installing ext-uopz ()
phpunit/phpunit-mock-objects suggests installing ext-soap ()
phpunit/php-code-coverage suggests installing ext-xdebug (>=2.4.0)
phpunit/phpunit suggests installing ext-xdebug ()
phpunit/phpunit suggests installing phpunit/php-invoker (~1.1)
Generating autoload files

Illuminate\Foundation\ComposerScripts::postInstall
php artisan optimize
PHP Fatal error: Uncaught exception 'InvalidArgumentException' with message 'Un
supported Sentry DSN scheme: ' in C:\xampp\htdocs\Laradmin\vendor\sentr
y\sentry\lib\Raven\Client.php:311
Stack trace:
#0 C:\xampp\htdocs\Laradmin\vendor\sentry\sentry\lib\Raven\Client.php(61): Raven
_Client::parseDSN('replace_with_yo...')
#1 C:\xampp\htdocs\Laradmin\vendor\sentry\sentry-laravel\src\Sentry\SentryLarave
l\SentryLaravel.php(18): Raven_Client->__construct(Array)
#2 C:\xampp\htdocs\Laradmin\vendor\sentry\sentry-laravel\src\Sentry\SentryLarave
l\SentryLaravelServiceProvider.php(87): Sentry\SentryLaravel\SentryLaravel::getC
lient(Array)
#3 C:\xampp\htdocs\Laradmin\vendor\laravel\framework\src\Illuminate\Container\Co
ntainer.php(746): Sentry\SentryLaravel\SentryLaravelServiceProvider->Sentry\Sent
ryLaravel{closure}(Object(Illuminate\Foundation\Application), Array)
#4 C:\xampp\htdocs\Laradmin\vendor\laravel\framework\src\Illuminate\Container\Co
ntainer.php(644): Illuminate\Container\Container->build(Object(Closure), Array)
#5 C:\xampp\ht in C:\xampp\htdocs\Laradmin\vendor\sentry\sentry\lib\Raven\Client
.php on line 311
PHP Fatal error: Uncaught exception 'InvalidArgumentException' with message 'Un
supported Sentry DSN scheme: ' in C:\xampp\htdocs\Laradmin\vendor\sentr
y\sentry\lib\Raven\Client.php:311
Stack trace:
#0 C:\xampp\htdocs\Laradmin\vendor\sentry\sentry\lib\Raven\Client.php(61): Raven
_Client::parseDSN('replace_with_yo...')
#1 C:\xampp\htdocs\Laradmin\vendor\sentry\sentry-laravel\src\Sentry\SentryLarave
l\SentryLaravel.php(18): Raven_Client->__construct(Array)
#2 C:\xampp\htdocs\Laradmin\vendor\sentry\sentry-laravel\src\Sentry\SentryLarave
l\SentryLaravelServiceProvider.php(87): Sentry\SentryLaravel\SentryLaravel::getC
lient(Array)
#3 C:\xampp\htdocs\Laradmin\vendor\laravel\framework\src\Illuminate\Container\Co
ntainer.php(746): Sentry\SentryLaravel\SentryLaravelServiceProvider->Sentry\Sent
ryLaravel{closure}(Object(Illuminate\Foundation\Application), Array)
#4 C:\xampp\htdocs\Laradmin\vendor\laravel\framework\src\Illuminate\Container\Co
ntainer.php(644): Illuminate\Container\Container->build(Object(Closure), Array)
#5 C:\xampp\ht in C:\xampp\htdocs\Laradmin\vendor\sentry\sentry\lib\Raven\Client
.php on line 311
Script php artisan optimize handling the post-install-cmd event returned with er
ror code 255

C:\xampp\htdocs\Laradmin>php artisan serve
PHP Fatal error: Uncaught exception 'InvalidArgumentException' with message 'Un
supported Sentry DSN scheme: ' in C:\xampp\htdocs\Laradmin\vendor\sentr
y\sentry\lib\Raven\Client.php:311
Stack trace:
#0 C:\xampp\htdocs\Laradmin\vendor\sentry\sentry\lib\Raven\Client.php(61): Raven
_Client::parseDSN('replace_with_yo...')
#1 C:\xampp\htdocs\Laradmin\vendor\sentry\sentry-laravel\src\Sentry\SentryLarave
l\SentryLaravel.php(18): Raven_Client->__construct(Array)
#2 C:\xampp\htdocs\Laradmin\vendor\sentry\sentry-laravel\src\Sentry\SentryLarave
l\SentryLaravelServiceProvider.php(87): Sentry\SentryLaravel\SentryLaravel::getC
lient(Array)
#3 C:\xampp\htdocs\Laradmin\vendor\laravel\framework\src\Illuminate\Container\Co
ntainer.php(746): Sentry\SentryLaravel\SentryLaravelServiceProvider->Sentry\Sent
ryLaravel{closure}(Object(Illuminate\Foundation\Application), Array)
#4 C:\xampp\htdocs\Laradmin\vendor\laravel\framework\src\Illuminate\Container\Co
ntainer.php(644): Illuminate\Container\Container->build(Object(Closure), Array)
#5 C:\xampp\ht in C:\xampp\htdocs\Laradmin\vendor\sentry\sentry\lib\Raven\Client
.php on line 311
PHP Fatal error: Uncaught exception 'InvalidArgumentException' with message 'Un
supported Sentry DSN scheme: ' in C:\xampp\htdocs\Laradmin\vendor\sentr
y\sentry\lib\Raven\Client.php:311
Stack trace:
#0 C:\xampp\htdocs\Laradmin\vendor\sentry\sentry\lib\Raven\Client.php(61): Raven
_Client::parseDSN('replace_with_yo...')
#1 C:\xampp\htdocs\Laradmin\vendor\sentry\sentry-laravel\src\Sentry\SentryLarave
l\SentryLaravel.php(18): Raven_Client->__construct(Array)
#2 C:\xampp\htdocs\Laradmin\vendor\sentry\sentry-laravel\src\Sentry\SentryLarave
l\SentryLaravelServiceProvider.php(87): Sentry\SentryLaravel\SentryLaravel::getC
lient(Array)
#3 C:\xampp\htdocs\Laradmin\vendor\laravel\framework\src\Illuminate\Container\Co
ntainer.php(746): Sentry\SentryLaravel\SentryLaravelServiceProvider->Sentry\Sent
ryLaravel{closure}(Object(Illuminate\Foundation\Application), Array)
#4 C:\xampp\htdocs\Laradmin\vendor\laravel\framework\src\Illuminate\Container\Co
ntainer.php(644): Illuminate\Container\Container->build(Object(Closure), Array)
#5 C:\xampp\ht in C:\xampp\htdocs\Laradmin\vendor\sentry\sentry\lib\Raven\Client
.php on line 311

I am a noob and first time setting up. Can anyone help getting started?

1. On running composer install the following error returns:
   Script php artisan optimize handling the post-install-cmd event returned with error code 255

When I go to it fails:
http://localhost/laradmin/public/

PHP error log:
[03-May-2017 13:38:37 Africa/Dar_es_Salaam] PHP Fatal error: Uncaught exception 'InvalidArgumentException' with message 'Unsupported Sentry DSN scheme: <not set>' in C:\wamp64\www\laradmin\vendor\sentry\sentry\lib\Raven\Client.php:311 Stack trace: #0 C:\wamp64\www\laradmin\vendor\sentry\sentry\lib\Raven\Client.php(61): Raven_Client::parseDSN('null') #1 C:\wamp64\www\laradmin\vendor\sentry\sentry-laravel\src\Sentry\SentryLaravel\SentryLaravel.php(18): Raven_Client->__construct(Array) #2 C:\wamp64\www\laradmin\vendor\sentry\sentry-laravel\src\Sentry\SentryLaravel\SentryLaravelServiceProvider.php(87): Sentry\SentryLaravel\SentryLaravel::getClient(Array) #3 C:\wamp64\www\laradmin\vendor\laravel\framework\src\Illuminate\Container\Container.php(746): Sentry\SentryLaravel\SentryLaravelServiceProvider->Sentry\SentryLaravel\{closure}(Object(Illuminate\Foundation\Application), Array) #4 C:\wamp64\www\laradmin\vendor\laravel\framework\src\Illuminate\Container\Container.php(644): Illuminate\Container\Container->build(Object(Closure), Array) #5 C:\wamp64\www\laradmin\vendor\laravel in C:\wamp64\www\laradmin\vendor\sentry\sentry\lib\Raven\Client.php on line 311

How Do I Login For First Time ?

Is there a working demo online available?