Retrieve a Givebutter campaign's peer-to-peer teams and member fundraising totals via the API

Known gotchas

• API keys are shown only once at creation — store them securely immediately since Givebutter cannot re-display them
• A 403 response means the key is valid but lacks permission (e.g., another organization's data) — distinct from a 401 auth failure
• Use documented pagination when listing teams/members for large campaigns rather than assuming a single page of results