Fix auto user creation for OIDC auth

packages/worker/src/sdk/users/users.ts

@@ -189,23 +189,34 @@ export const save = async (
   const tenantId = tenancy.getTenantId()
   const db = tenancy.getGlobalDB()
   let { email, _id } = user
+  if (!email && !_id) {
+    throw new Error("_id or email is required")
+  }
 
   let dbUser: User | undefined
   if (_id) {
     // try to get existing user from db
-    dbUser = (await db.get(_id)) as User
-    if (email && dbUser.email !== email) {
-      throw "Email address cannot be changed"
+    try {
+      dbUser = (await db.get(_id)) as User
+      if (email && dbUser.email !== email) {
+        throw "Email address cannot be changed"
+      }
+      email = dbUser.email
+    } catch (e: any) {
+      if (e.status === 404) {
+        // do nothing, save this new user with the id specified - required for SSO auth
+      } else {
+        throw e
+      }
     }
-    email = dbUser.email
-  } else if (email) {
+  }
+
+  if (!dbUser && email) {
     // no id was specified - load from email instead
     dbUser = await usersCore.getGlobalUserByEmail(email)
     if (dbUser && dbUser._id !== _id) {
       throw `Unavailable`
     }
-  } else {
-    throw new Error("_id or email is required")
   }
 
   await validateUniqueUser(email, tenantId)