fix: security improvements (#2593)

packages/auth/server/types/email-password.ts

@@ -1,5 +1,6 @@
 import { z } from 'zod';
 
+import { ZNameSchema } from '@documenso/lib/constants/auth';
 import { zEmail } from '@documenso/lib/utils/zod';
 
 export const ZCurrentPasswordSchema = z
@@ -36,7 +37,7 @@ export const ZPasswordSchema = z
   });
 
 export const ZSignUpSchema = z.object({
-  name: z.string().min(1),
+  name: ZNameSchema,
   email: zEmail(),
   password: ZPasswordSchema,
   signature: z.string().nullish(),