We\'re developing a web application that allows clients to create and display products. We\'d like to provide our clients with metrics from our Google Analytics account reg
GAPI can do this for you, the account details go in the code rather than needing a user to auth a GA account: GAPI - Google Analytics API PHP Interface
You can create your own dashboard by accessing the analytics data with an API. See https://developers.google.com/analytics/devguides/reporting/
Is there a way to access Google Analytics data for an account we have access to but the user of the web application does not?
Yes, you can use a refresh token. Store the refresh token in a db or secure config file, then use it to show the client stats on their dashboard.