feat: invite new user with email

backend/src/user/dto/createUser.dto.ts

@@ -1,12 +1,15 @@
-import { Expose, plainToClass } from "class-transformer";
-import { Allow } from "class-validator";
+import { plainToClass } from "class-transformer";
+import { Allow, IsOptional, MinLength } from "class-validator";
 import { UserDTO } from "./user.dto";
 
 export class CreateUserDTO extends UserDTO {
-  @Expose()
   @Allow()
   isAdmin: boolean;
 
+  @MinLength(8)
+  @IsOptional()
+  password: string;
+
   from(partial: Partial<CreateUserDTO>) {
     return plainToClass(CreateUserDTO, partial, {
       excludeExtraneousValues: true,