how would i only require a first name?

name.first

isnt working

on the top-level required key, you just need to specify you require a “name” key

"required": ["email",...,"name"]

then on the name object specify you only require the “first” key

"name": {
          "type": "object",
          "properties": {
            "first": {
              "title": "First Name",
              "type": "string"
            },
            "last": {
              "title": "Last Name",
              "type": "string"
            }
          },
          "required": ["first"]
        }