Suba - if you are a partner developing an integration to Laserfiche, you should develop your integration with the developer account and follow the instructions in this page:
https://developers.docusign.com/partner/isv-general-connector-implementation/
Note the best practices in this page: https://developers.docusign.com/partner/key-esignature-options/
we recommend you use a single integration key for all of your customers.
Once your integration is ready, make sure you join our Partner Program and go through the application review process. Upon successful review, you may be entitled to a free production account to manage your integration key, and can have your integration listed in our Partner Finder directory.
Please let us know if you need additional information, and good luck with your implementation!