App Blocked

[giordan...@gmail.com]

hello everybody,

I have developed an iOS application that can access to google drive. I am able to access to a my google drive account but if I try to access to another  my google drive account I receive the message "This app is blocked" and "This app tried to access sensitive information on your account. To protect your account, Google has blocked access."

Is there someone able to explain me this problem? I don't remember the exact date but until some time ago I could easily access multiple accounts.

Thanks and regards,

Giordano