Unofficial .NET package for satispay online API.
using SatispayOnline;
var satispayOnline = new SatispayOnlineClient("<SecurityBearerString>");
// for sandbox
var satispayOnline = new SatispayOnlineClient("<SecurityBearerString>", SatispayEnvironment.Sandbox);
// create a user
SatispayUser user = await satispayOnline.CreateUserAsync("<PhoneNumber>");