[OAuth2][Laravel][Resolved] your requirements could not be resolved to an installable set of packages

Problem

My story is i am following a tutorial and tried to install OAuth2 package with composer for laravel5.0 but fail, this is the part i added in composer.json located in project root.

    "require": {
        "laravel/framework": "5.0.*",
        "lucadegasperi/oauth2-server-laravel": "5.0.*"
    },

the related command on Windows platform :

composer update

And the error message :

your requirements could not be resolved to an installable set of packages: Conclusion: don't install laravel/frameworkv5.0.xx

Solution

Firstly you have to visit official OAuth2 package website to check are you required to install a correct OAuth2 package version via composer

Official site of github lucadegasperi/oauth2-server-laravel :
https://github.com/lucadegasperi/oauth2-server-laravel

For my case i should install "lucadegasperi/oauth2-server-laravel": "4.0.*" but not "lucadegasperi/oauth2-server-laravel": "5.0.*" for my laravel 5.0.x.

So i have to correct the oauth2 version and run "composer update" command again.

    "require": {
        "laravel/framework": "5.0.*",
        "lucadegasperi/oauth2-server-laravel": "4.0.*"
    },