Fix discord user schema (#969)

## Description:

Update the discord user zod schema to address login failures for users
without avatars.

## Please complete the following:

- [x] I have added screenshots for all UI updates
- [x] I process any text displayed to the user through translateText()
and I've added it to the en.json file
- [x] I have added relevant tests to the test directory
- [x] I confirm I have thoroughly tested these changes and take full
responsibility for any bugs introduced
- [x] I understand that submitting code with bugs that could have been
caught through manual testing blocks releases and new features for all
contributors

Co-authored-by: Scott Anderson <662325+scottanderson@users.noreply.github.com>

src/core/ApiSchemas.ts

@@ -34,11 +34,11 @@ export type TokenPayload = z.infer<typeof TokenPayloadSchema>;
 export const UserMeResponseSchema = z.object({
   user: z.object({
     id: z.string(),
-    avatar: z.string(),
+    avatar: z.string().nullable(),
     username: z.string(),
-    global_name: z.string(),
+    global_name: z.string().nullable(),
     discriminator: z.string(),
-    locale: z.string(),
+    locale: z.string().optional(),
   }),
   player: z.object({
     publicId: z.string(),