I am making a website like flippa to sell established websites, I want to verify website traffic like flippa do, I searched for how to get reports of visits last 12 months but I can't, what I do make client click on link
https://accounts.google.com/o/oauth2/auth?access_type=offline&client_id=814867900881-28dlacj0v68nh9suspfjlnvjgscalaql.apps.googleusercontent.com&prompt=consent&redirect_uri=http://localhost:3000/redirect&response_type=code&scope=https%3A%2F%2Fwww.googleapis.com%2Fauth%2Fanalytics.readonly&state=9612
to get code then use that code to get access_token
POST https://accounts.google.com/o/oauth2/token
code=4/gXCN77EWLDCO_fake_p2tvfakezOg6Mn0fakej2vA.giyP3fakejxeAeYFZr95uygvU3j0dumQI&
client_id=104608secret-secret-secret-secret.apps.googleusercontent.com&
client_secret=90V0FAKE_WkFAKExrHCZti&
redirect_uri=http://www.mywebapp.com/oauth2callback&
grant_type=authorization_code
then I get access token
{
"access_token": "ya29.Il-yBwla5jnTECDlX5rbVk_Oq4hireOUmSzeaTWW2BgYYsBCoPn6pKnQVxIUQtGc0BXblEq_2ZQ-zhrrGeL9xYYuSyd8lvRAoPBUVKUN8liBwx-w8ok2oGh2Cknql2ucew",
"expires_in": 3600,
"refresh_token": "1//031hXU_jNeKEECgYIARAAGAMSNwF-L9Irds9iUaPkcGDDOSHP2-8-1FKYBRW1GaBz1fLzEoDnEcNIm89k-bZzYWXAqie5Or-Fg94",
"scope": "https://www.googleapis.com/auth/analytics.readonly",
"token_type": "Bearer"
}
and don't know what I do next and if what I do is the right way I need the correct way to get user GA reporting