Using LinkedIn OAuth v2 API and get specific user information by default

I’m trying to make a portfolio website that by default fetches my LinkedIn info and has a button that lets you display your LinkedIn info in the website. I don’t know what is the best practice to fetch my LinkedIn info by default, should I use the Code returned by LinkedIn OAuth 2 API in an .env file and use it to get access_token each time it displays in browser? I’m confused about best practices for this scenario.