Ask HN: Access Control to Google Analytics

I will try to be as clear as possible in asking the question. Currently we use Google Analytics (GA) using a Google Account. Various teams in our office have access to this account by sharing the password to the Google Account.

Example: company.name [at] gmail [dot] com / password

The requirement is to restrict access to GA by: (i) IP address -- using custom URL for GA where any IP which does not belong to office cannot access the account (Can you create custom login screen for GA?) (ii) Password -- by using a password manger (but firefox will show the password at browser level, is there a way around this?) (iii) Using One Time Password (OTP) -- by using GA API to create dynamic passwords for every login (is this possible?)

Is there any other way to achieve this?

Thanks in advance.