put https://developer.beta.salussafety.io/v1/certificate//upload/
Upload an image of the certificate front and/or back to an existing certificate.
Supported filetypes are: .jpeg, .jpg, .png, .pdf, .docx, .mp4, .mov and .m4v.
This endpoint supports uploading the front and back of the certificate at the same time. If certificate_back is omitted, the back will not be modified. To remove the back of the certificate, you must also set certificate_back_remove=true
If both the certificate_back and certificate_back_remove are specified, then certificate_back will take priority and certificate_back_remove will be ignored.