Link Bank Account

Point a bank feed's account at a chart account. Name element_id for an existing active account, or entity_id alone to create one in that entity's chart. The chart the account is in decides whose books the feed's lines go into, so this is also how a feed account is bound to a subsidiary. Lines still in the inbox move with it (across an entity change their suggestion is resolved again on the new chart, and a classification that named the old entity's account is dropped); posted entries stay where they were posted. An account another connection already feeds is refused, as is an entity whose books QuickBooks keeps (the group parent, while QuickBooks is connected). An account the feed created and then left stays on its chart as an ordinary account. A sync already in flight when the link moves can still land a line or two on the old account; running this again moves them. Read the group's accounts with the bankAccounts GraphQL field.

Idempotency: supply an Idempotency-Key header to make safe retries; replays within 24 hours return the same envelope. Reusing the key with a different body returns HTTP 409 Conflict.