Feat(medusa, user, core-flows): User creation with invites (#6413)

**What**
- add accept invite endpoint 

**Invite accept flow**
- authenticate using the auth endpoint to create and auth-user
- invoke accept endpoint with token and info to create user

packages/types/src/user/mutations.ts

@@ -15,6 +15,7 @@ export interface CreateInviteDTO {
   metadata?: Record<string, unknown> | null
 }
 
-export interface UpdateInviteDTO extends Partial<CreateInviteDTO> {
+export interface UpdateInviteDTO
+  extends Partial<Omit<CreateInviteDTO, "email">> {
   id: string
 }

packages/types/src/user/service.ts

@@ -12,6 +12,11 @@ import { IModuleService } from "../modules-sdk"
 import { RestoreReturn, SoftDeleteReturn } from "../dal"
 
 export interface IUserModuleService extends IModuleService {
+  validateInviteToken(
+    token: string,
+    sharedContext?: Context
+  ): Promise<InviteDTO>
+
   retrieve(
     id: string,
     config?: FindConfig<UserDTO>,

packages/types/src/workflow/invite/accept-invite.ts

@@ -0,0 +1,10 @@
+export interface AcceptInviteWorkflowInputDTO {
+  invite_token: string
+  auth_user_id: string
+  user: {
+    first_name?: string | null
+    last_name?: string | null
+    avatar_url?: string | null
+    metadata?: Record<string, unknown> | null
+  }
+}

packages/types/src/workflow/invite/index.ts

@@ -1,3 +1,3 @@
 export * from "./create-invite"
-export * from "./update-invite"
 export * from "./delete-invite"
+export * from "./accept-invite"

packages/types/src/workflow/invite/update-invite.ts

@@ -1,5 +0,0 @@
-import { UpdateInviteDTO } from "../../user"
-
-export interface UpdateInvitesWorkflowInputDTO {
-  updates: UpdateInviteDTO[]
-}