I have created a new project with

laravel new blogposts

using “composer i installed”

When i trying to install passport using

composer require laravel/passport

following errors are their

Your requirements could not be resolved to an installable set of packages.

  Problem 1
    - laravel/passport[v4.0.0, ..., v4.0.3] require guzzlehttp/guzzle ~6.0 -> found guzzlehttp/guzzle[6.0.0, ..., 6.5.8] but it conflicts with your root composer.json require (^7.2).
    - Root composer.json requires laravel/passport ~4.0 -> satisfiable by laravel/passport[v4.0.0, v4.0.1, v4.0.2, v4.0.3].

Use the option --with-all-dependencies (-W) to allow upgrades, downgrades and removals for packages currently locked to specific versions.

Solution:-

composer require laravel/passport  --with-all-dependencies