What is the purpose of the "integration key" in DocuSign?

The integration key in DocuSign serves a critical role in identifying and authenticating integrations with the API. It acts as a unique identifier for applications that interact with DocuSign's services, ensuring that requests made through the API are recognized and verified. This helps in securing the connections and ensuring that only authorized applications can access specific functionalities or data within the DocuSign platform.

By utilizing an integration key, developers can enable their applications to send envelopes, retrieve user information, and perform other tasks securely. This authentication process is vital for maintaining the integrity and security of user data and application interactions, making it a foundational element for any integration efforts with DocuSign.

In contrast, the other options do not align with the primary function of the integration key. Creating new user accounts, managing billing information, and collecting user feedback involve different aspects of the DocuSign platform and require different tools and processes distinct from the integration key's purpose.