Can't figure out which permissions i need to access Partner center

In the official documentation i found this https://docs.microsoft.com/en-us/partner-center/develop/partner-center-authentication?tabs=powershell-app-only%2Cpowershell-partner-consent%2Cpowershell-csp-auth%2Cdotnet-cpv-auth#partner-consent.
But when i execute the powershell code my refresh token is empy when i Writ-Host the variable. I guess because I don't have the right permissions but I can't seem to see what specific permissions I need.
I can access the https://partner.microsoft.com/en-us/pcv/dashboard without any problems and I have the rigth permissions to access every function.