Revamp auth module to support multiple providers linked to a single auth identity (#7521)

packages/medusa/src/api/auth/[actor_type]/[auth_provider]/callback/route.ts

@@ -45,7 +45,9 @@ export const GET = async (req: MedusaRequest, res: MedusaResponse) => {
     await service.validateCallback(auth_provider, authData)
 
   const entityIdKey = `${actor_type}_id`
-  const entityId = authIdentity.app_metadata?.[entityIdKey]
+  const entityId = authIdentity?.app_metadata?.[entityIdKey] as
+    | string
+    | undefined
   if (success) {
     const { http } = req.scope.resolve(
       ContainerRegistrationKeys.CONFIG_MODULE
@@ -54,9 +56,9 @@ export const GET = async (req: MedusaRequest, res: MedusaResponse) => {
     const { jwtSecret, jwtExpiresIn } = http
     const token = generateJwtToken(
       {
-        actor_id: entityId,
+        actor_id: entityId ?? "",
         actor_type,
-        auth_identity_id: authIdentity.id,
+        auth_identity_id: authIdentity?.id ?? "",
         app_metadata: {
           [entityIdKey]: entityId,
         },

packages/medusa/src/api/auth/[actor_type]/[auth_provider]/route.ts

@@ -57,14 +57,16 @@ export const GET = async (req: MedusaRequest, res: MedusaResponse) => {
     ).projectConfig
 
     const entityIdKey = `${actor_type}_id`
-    const entityId = authIdentity.app_metadata?.[entityIdKey]
+    const entityId = authIdentity?.app_metadata?.[entityIdKey] as
+      | string
+      | undefined
     const { jwtSecret, jwtExpiresIn } = http
 
     const token = generateJwtToken(
       {
-        actor_id: entityId,
+        actor_id: entityId ?? "",
         actor_type,
-        auth_identity_id: authIdentity.id,
+        auth_identity_id: authIdentity?.id ?? "",
         app_metadata: {
           [entityIdKey]: entityId,
         },

packages/medusa/src/commands/user.ts

@@ -56,8 +56,9 @@ export default async function ({
         process.exit(1)
       }
 
+      // We know the authIdentity is not undefined
       await authService.update({
-        id: authIdentity.id,
+        id: authIdentity!.id,
         app_metadata: {
           user_id: user.id,
         },