typeof Roblox == "undefined" && (Roblox = {}), typeof Roblox.SignupOrLogin == "undefined" && (Roblox.SignupOrLogin = function() {
    var r = {
        unknown: 1, //none selected
        male: 2, //M selected
        female: 3 //F selected
    },
    u = { //which action to choose
        signup: 0,
        login: 1
    },
    f = { //???
        signup: 0,
        login: 1,
        captcha: 2,
        twostep: 3
    },
    n, t, e = function(t) { //n and t appear empty but they're assigned later on in the script??
        typeof n == "function" && n(t)
    },
    o = function(n) {
        typeof t == "function" && t(n)
    },
    i = function(n) { //reset all POST params
        n.data("params", {})
    },
    s = function(r) { //init
        typeof r.onSignupSuccess == "function" && (n = r.onSignupSuccess), typeof r.onLoginSuccess == "function" && (t = r.onLoginSuccess), i($(".signup-or-log-in"))
    },
    h = function(n, t, i) { //addSignupParam
        var r = n.data("params");
        typeof r == "undefined" && (r = {}), r[t] = {
            name: t,
            value: i
        }, n.data("params", r)
    };
    return { //later on in the script it says things like Roblox.SignupOrLogin.SectionType....
        GenderType: r,
        SectionType: f,
        CaptchaFlowType: u,
        addSignupParam: h,
        onLoginSuccess: o,
        onSignupSuccess: e,
        resetParams: i,
        init: s
    }
})

signupOrLogin.controller("CaptchaController", ["$scope", "$http", "$rootElement", "captchaService", "displayService", function(n, t, i, r, u) {
    var f = function() {
        Recaptcha.reload()
    };
    n.isSubmitting = !1, n.submitCaptcha = function(t) {
        r.submitCaptcha(t, f, n)
    }, n.isSectionShown = !1, n.$on("display:updated", function(t, i) {
        n.$validationMessage = "", n.isSectionShown = i === Roblox.SignupOrLogin.SectionType.captcha
    }), n.captchaFlowType = Roblox.SignupOrLogin.CaptchaFlowType.signup, n.$on("captcha:loaded", function(t, i) {
        n.captchaResponse = "", n.captchaFlowType = i.captchaFlow, n.username = i.username, f(), u.setDisplayState(Roblox.SignupOrLogin.SectionType.captcha), n.isSectionShown = !0, Roblox.SignupOrLoginIframe && Roblox.SignupOrLoginIframe.resizeFrame(Roblox.SignupOrLogin.SectionType.captcha)
    })
}]);

signupOrLogin.controller("SignupOrLoginController", ["$document", "$rootScope", "displayService", function(n, t, i) {
    n.on("display:updated", function(n, r) {
        i.setDisplayState(r), t.$apply()
    })
}]);

signupOrLogin.factory("captchaService", ["$rootScope", "$http", function(n, t) { //just your standard captcha???
    var i = Roblox.SignupOrLogin.CaptchaFlowType.signup,
    u = function(n, u, f) {
        var o = angular.element(n.target),
            s = angular.element(".signup-or-log-in .captcha-container"),
            h = {
                recaptcha_challenge_field: s.find("#recaptcha_challenge_field").val(),
                recaptcha_response_field: s.find("#recaptcha_response_field").val()
            },
            e;
        if (f.captchaFlowType === Roblox.SignupOrLogin.CaptchaFlowType.signup) e = o.data("signup-captcha-api-url"); //url: https://api.roblox.com/captcha/validate/signup
        //login isn't important right now //else if (i === Roblox.SignupOrLogin.CaptchaFlowType.login) e = o.data("log-in-captcha-api-url"), h.username = f.username;
        else throw "Unknown Captcha flow";
        f.isSubmitting = !0, t({
            method: "POST",
            url: e,
            data: $.param(h),
            headers: {
                "Content-Type": "application/x-www-form-urlencoded"
            },
            crossDomain: !0
        }).success(function() {
            f.isSubmitting = !1, f.$validationMessage = "", r()
        }).error(function(n, t) {
            f.isSubmitting = !1, t === 403 ? (f.$validationMessage = "Captcha incorrect", u()) : (f.$validationMessage = "Unknown error", u())
        })
    },
    r = function() {
        i == Roblox.SignupOrLogin.CaptchaFlowType.signup ? n.$broadcast("captcha:signupSuccess") : i == Roblox.SignupOrLogin.CaptchaFlowType.login && n.$broadcast("captcha:loginSuccess")
    };
    return {
        getCaptchaFlowType: function() {
            return i
        },
        setCaptchaFlowType: function(t, r) {
            i = t;
            var u = {
                captchaFlow: t
            };
            r && (u.username = r), n.$broadcast("captcha:loaded", u)
        },
        onAfterCaptchaSuccess: r,
        submitCaptcha: u
    }
}]);

signupOrLogin.factory("signupService", ["$http", "captchaService", "displayService", "$rootElement", function(n, t, i) {
    var u = function(r) {
        var s = angular.element("#signup-button"),
            h = s.data("signup-api-url"), //this URL is https://api.roblox.com/signup/v1
            u = {},
            o = angular.element(".signup-or-log-in"),
            e = o.data("params"),
            f;
        typeof e == "undefined" && (e = {}), $.each(e, function(n, t) {
            u[n] = t
        }), f = o.data("metadata-params"), typeof f == "undefined" && (f = {}), $.each(f, function(n, t) {
            u[n] = t
        }), $.extend(u, {
            username: r.signup.username,
            password: r.signup.password,
            birthday: r.signup.birthdayDay + " " + r.signup.birthdayMonth + " " + r.signup.birthdayYear,
            gender: r.signup.gender,
            context: r.signupForm.context
        }), n({
            method: "POST",
            url: h,
            data: $.param(u),
            headers: {
                "Content-Type": "application/x-www-form-urlencoded"
            },
            crossDomain: !0,
            withCredentials: !0
        }).success(function(n) {
            Roblox.SignupOrLogin.onSignupSuccess(n.userId)
        }).error(function(n, u) {
            if (r.badSubmit = !0, r.isSubmitting = !1, u === 403) {
                var f = 0;
                n.reasons.indexOf("Captcha") !== -1 && (r.isSubmitting = !1, r.isSectionShown = !1, i.setDisplayState(Roblox.SignupOrLogin.SectionType.captcha), t.setCaptchaFlowType(Roblox.SignupOrLogin.CaptchaFlowType.signup), f += 1), n.reasons.indexOf("GenderInvalid") !== -1 && (r.signup.gender = 1, f += 1), n.reasons.indexOf("PasswordInvalid") !== -1 && (r.signupForm.password.$setValidity("password", !1), r.signupForm.password.$passwordMessage = "Password is invalid", f += 1), n.reasons.indexOf("UsernameInvalid") !== -1 && (r.signupForm.username.$setValidity("validusername", !1), r.signupForm.username.$usernameMessage = "Username is invalid", f += 1), n.reasons.indexOf("UsernameTaken") !== -1 && (r.signupForm.username.$setValidity("unique", !1), r.signupForm.username.$usernameMessage = "Username is taken", f += 1), f < n.reasons.length && (r.signupForm.$generalError = !0, r.signupForm.$generalErrorText = "Sorry, an error occurred.")
            } else r.signupForm.$generalError = !0, r.signupForm.$generalErrorText = "Sorry, an error occurred."
        })
    },
    return {
        submitSignup: u
    }
}]);

data = {
    'username':'1md01923mj', #random
    'password':'1md01923mj00',
    'birthday':'4 Nov 1981',
    'gender':3, #I presume it's an int instead of a str, the JavaScript doesn't use strings with this.
    'context':'RollerCoaster', #required, otherwise we get an InternalServer error
    'isEligibleForHideAdsAbTest':'False', #same as above
}

headers = { #same as the JavaScript
    "Content-Type": "application/x-www-form-urlencoded",
}

url='https://api.roblox.com/signup/v1' #same as JavaScript

r=Session.post(url=url, data=data, headers=headers, verify=True) #POST the request
print(r.text, r.status_code)