Hello RickS015,
Thank you for reaching out to Constant Contact API Developer Support. My team is here to assist outside software developers with questions about building into Constant Contact's API.
While our familiarity with any other party's API is limited, the Google Maps API appears to only involve access to the Maps platform, not to any user's personal account data (saved places, timeline, etc). This is a key difference from our V3 API, which does allow access to our clients’ account data.
The OAuth flow we use allows the Constant Contact account owner to review the types of data and functionality that your application is requesting (scopes), prior to granting access, as the developer of an app is not necessarily the owner of the Constant Contact account’s resources that they are accessing.
Our API is designed to protect both our users, and their contacts, from having their data compromised. Short-lived access tokens allow Constant Contact to handle credentials in a secure way. By eliminating basic authentication and using access tokens with a limited lifespan, it decreases the risk and impact of compromised credentials.
Please let us know if you have any other questions! You can also reach our team directly via email at webservices@constantcontact.com
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