Based on the post linked below from several years ago it seems at one time the docusign integration from Laserfiche used basic authentication. However this is not mentioned anywhere in the documentation of the latest version, so we did not enable basic authentication anywhere. But we still get the error that our password is wrong even when it is correct.

https://answers.laserfiche.com/questions/180193/Docusign-Error-One-or-both-of-Username-and-Password-are-invalid#213016