What is the easiset way from the clients perspective to authorise me to connect to their GA4 & UA properties? I have to connect more than 30 to Make (formerly Integromat). I can use a HTTP calls
Client can not add my external email address on their google instance to give me access. I need alternative & very user friendly options please
The only way to do this is to use Oauth2 request authorization of the client to access their data.
You can store the refresh token in your database asdocated with the user. Then your code will be able to request a new access token when ever you need