- Added the ability for a student/developer to choose a gender for a speaking instructor;

- Made it so, if chosen, the user will only get speaking exams with their chosen gender;
- Added the ability for speaking exams to select a gender when generating;

src/interfaces/user.ts

@@ -1,4 +1,5 @@
 import {Module} from ".";
+import {InstructorGender} from "./exam";
 
 export type User = StudentUser | TeacherUser | CorporateUser | AgentUser | AdminUser | DeveloperUser;
 
@@ -21,6 +22,7 @@ export interface BasicUser {
 
 export interface StudentUser extends BasicUser {
 	type: "student";
+	preferredGender?: InstructorGender;
 	demographicInformation?: DemographicInformation;
 }
 
@@ -48,6 +50,7 @@ export interface AdminUser extends BasicUser {
 
 export interface DeveloperUser extends BasicUser {
 	type: "developer";
+	preferredGender?: InstructorGender;
 	demographicInformation?: DemographicInformation;
 }