Allow This will redirect to consent screen,
Step 2: Now user has approved your app from consent screen from step 1
The response is access token and refreshtoken
{
"access_token": "yXXXXX_A",
"token_type": "Bearer",
"expires_in": 3600,
"refresh_token": "1XXXXXFw"
}
Step 3 : User tries to link his another adwords account to same app but he has not logged out from his adwords account which was approved from step 2, Now url will be same as step 1 as it is same app and user click on Authorize API button
In this case user will not be see consent screen and simply response without refreshtoken
{
"access_token": "yaXXXXXUg",
"token_type": "Bearer",
"expires_in": 3593
}
Thanks,