fix(medusa): Error messages for reset tokens (#3514)

* initial

* reset password token handling

* Create .changeset/old-planes-cross.md

---------

Co-authored-by: Oliver Windall Juhl <59018053+olivermrbl@users.noreply.github.com>

integration-tests/api/__tests__/admin/user.js

@@ -171,6 +171,16 @@ describe("/admin/users", () => {
     })
 
     describe("Password reset", () => {
+      it("Doesn't fail to fetch user when resetting password for an unknown email (unauthorized endpoint)", async () => {
+        const api = useApi()
+
+        const resp = await api.post("/admin/users/password-token", {
+          email: "test-doesnt-exist@test.com",
+        })
+
+        expect(resp.status).toEqual(204)
+      })
+
       it("Doesn't fail when generating password reset token (unauthorized endpoint)", async () => {
         const api = useApi()