chore: Update user avatar data to be nullish (#345)

Author: scottlovegrove

src/types/entities.ts

@@ -279,10 +279,10 @@ export const CurrentUserSchema = z.object({
     id: z.string(),
     email: z.string(),
     fullName: z.string(),
-    avatarBig: z.string().nullable(),
-    avatarMedium: z.string().nullable(),
-    avatarS640: z.string().nullable(),
-    avatarSmall: z.string().nullable(),
+    avatarBig: z.string().nullish(),
+    avatarMedium: z.string().nullish(),
+    avatarS640: z.string().nullish(),
+    avatarSmall: z.string().nullish(),
     businessAccountId: z.string().nullable(),
     isPremium: z.boolean(),
     dateFormat: z.number().int(),