Okay, got it.
As the docs.discourse.org states, you have to make a POST
request to the address yourforum/users
with this fields:
{
"name": "string",
"email": "string",
"password": "string",
"username": "string",
"active": true,
"approved": true,
"user_fields[1]": "string"
}
In this request, fields that you have to send are: name, email, password and username
.
As this is a POST
request, even simple HTML form should be enough, if I understand well