My customer's administrator recently died and now my customer has no login data, neither for the backend of his content-management-system nor the administration system of his provider. He only has an FTP-Login left.
Via hostadvice.com I found out that his website is hosted on Google Cloud Platform.
Is there a way to retrieve the login data when both the login and the password are missing?
What can I do or what must my customer do to get the control of his webspace back?
First of all I recommend you to remove your domain from the original post, Then I think @massimo is right, the best option is to contact Google directly.
Please take a look at the following link to know more information about how to recover the control from your account.
According to this information If you can't contact your admin , you need to fill out the following form Google Admin console login issues form.
Additionally, you can visit this URL Can't sign in to your Google Account this link is to recover the Google account.
I hope this information is useful for you.
You really should ask Google support; if you can provide proof that your customer is the real owner of the web site, they should be able to reset access credentials.
