action id4i_register_user {
  label: "Register user"
  description: "Registering a new user."
  provider: id4i
  method: POST
  path: "/account/registration"
  encoding: json
  input: {
    type: "object"
    required: ["email", "password", "username"]
    properties: {
      email: {
        type: "string"
      }
      password: {
        type: "string"
      }
      username: {
        type: "string"
      }
    }
  }
  output: {
    type: "object"
    required: ["id"]
    properties: {
      email: {
        type: "string"
      }
      id: {
        type: "integer"
        format: "int64"
      }
      message: {
        type: "string"
      }
      username: {
        type: "string"
      }
    }
  }
}