title: DocuSign Integration / API
body: <p>Task is to implement a DocuSign integration for numerous tenants. </p>
  
  <p>We have found a question <a href="https://stackoverflow.com/questions/42823344/docusign-integration-single-integration-key-for-multi-tenant-application">here</a> giving us a hint how to do it.</p>
  
  <p>But there are more questions: </p>
  
  <ol>
  <li>what subscription would be good to implement the integration?</li>
  <li>if we connect to the tenant's account using a master key(belongs to the integrator, not to the tenant), and create envelopes in the tenant's account, who pays then - the integrator or the tenant in whose account the envelope is created?</li>
  </ol>