feat(Implement functionality for a complete USSD request):

Adds utility functions for graph interaction with user objects.

src/lib/types/graph/user.ts

@@ -0,0 +1,54 @@
+export const userAccountFields = `accounts {
+            id
+          }`
+
+export const personalInformationFields = `{
+            family_name
+            gender
+            gender_type {
+              value
+            }
+            geo
+            given_names
+            location_name
+            user_identifier
+            year_of_birth
+          }`
+
+export const userFields = `{
+          id
+          created_at
+          activated
+          personal_information ${personalInformationFields}
+          ${userAccountFields}
+        }`
+
+export enum Gender {
+  MALE = "MALE",
+  FEMALE = "FEMALE",
+}
+
+export enum InterfaceType {
+  USSD = "USSD",
+  WEB = "WEB",
+}
+
+export type  PersonalInformation = {
+  family_name?: string;
+  gender?: string;
+  gender_type?: {
+    value?: string;
+  }
+  geo?: string;
+  given_names?: string;
+  location_name?: string;
+  user_identifier?: number;
+  year_of_birth?: number;
+}
+
+export type User = {
+  activated: boolean;
+  interface_identifier: string;
+  interface_type: string;
+  personal_information?: PersonalInformation;
+}