Using https://github.com/mattrglobal/bbs-signatures
Throw a POST request to the following URL
//To create VC... http://domain:3000/create_vc
input---
publicKey: Issuer's publicKey
secretKey: Issuer's secretKey
messages: messages
output---
proof: proofValue of a VC
※This API does not strictly generate VCs.
※You get only the proofValue